RSI Indicator: Settings, Signals & Divergence

How RSI Is Calculated: The Mathematics Behind the Indicator

Before you can use RSI intelligently, it helps to understand what the number actually represents. The formula does not need to intimidate you - once you break it down step by step, the logic becomes intuitive.

The RSI formula has two components. First, you calculate the Relative Strength (RS), which is the ratio of the average gain to the average loss over a chosen lookback period. Then you normalise that ratio into a 0-to-100 scale. Here is how it unfolds:

Step 1 - Separate up-days from down-days: For each trading session in your lookback period (typically 14), record the closing price change. If today's close is higher than yesterday's, that change is an "up" move. If it is lower, it is a "down" move. If it is unchanged, it contributes zero to both averages.

Step 2 - Compute the initial averages: Sum all the up-moves over 14 periods and divide by 14 to get the Average Gain. Sum all the down-moves (use absolute values, so they are positive numbers) and divide by 14 to get the Average Loss.

Step 3 - Apply Wilder's smoothing: From the 15th period onwards, Wilder used a specific smoothing method (now called Wilder Smoothing or RMA - Running Moving Average). The new Average Gain equals [(Previous Average Gain × 13) + Current Gain] ÷ 14. The same formula applies to Average Loss.

Step 4 - Calculate RS: Divide Average Gain by Average Loss.

Step 5 - Normalise to get RSI: RSI = 100 − [100 ÷ (1 + RS)].

The normalisation step is clever. When Average Gain equals Average Loss, RS = 1, and RSI = 50 - perfectly neutral. When price gains dominate losses entirely, Average Loss approaches zero, RS approaches infinity, and RSI approaches 100. When losses dominate entirely, Average Gain approaches zero, RS approaches zero, and RSI approaches 0.

What does this tell us in practice? An RSI of 70 means that over the past 14 periods, average gains have been roughly 2.33 times the average losses. An RSI of 30 means average losses have been roughly 2.33 times the average gains. These numbers reflect momentum - specifically, the relative velocity of buyers versus sellers.

One important nuance for Indian market traders: RSI responds to the number of periods, not the time span. A 14-period RSI on a 5-minute chart looks at 70 minutes of data. A 14-period RSI on a daily chart looks at 14 trading sessions, roughly three calendar weeks. The same reading of, say, 65 on both charts means very different things contextually - the 5-minute RSI at 65 might simply reflect a short burst of intraday buying, while the daily RSI at 65 reflects multi-week accumulated momentum. Always note which timeframe you are reading before acting on any signal.

Also worth noting: most platforms default to 14 periods, but some use Cutler's RSI, which uses simple moving averages rather than Wilder's smoothing. The differences are small but can cause slight discrepancies between platforms. If you notice your RSI values differing slightly between your Flattrade terminal and another charting service, this is usually the reason. Stick to one platform for consistency in your analysis.

Standard Settings: Choosing the Right RSI Period for Your Trading Style

The default RSI period of 14 was chosen by Wilder because he primarily traded daily commodity charts, and 14 days represented roughly half a lunar cycle - a timeframe he felt captured meaningful market cycles. Decades later, 14 remains the industry standard and is what most institutional and retail traders use, making it a self-fulfilling reference point: enough market participants watch the 14-period RSI that its signals influence actual order flow.

However, you are not locked into 14. Different trading styles call for different sensitivity levels, and adjusting the RSI period is one of the simplest ways to tune the indicator to your needs.

Shorter periods (5–9): A 7-period RSI reacts much faster to price changes. It reaches overbought and oversold extremes more frequently, giving you more signals. The trade-off is more noise and more false signals. Scalpers operating on 1-minute or 3-minute charts of high-liquidity NSE instruments like Nifty 50 futures or Bank Nifty futures often use shorter periods because they need quicker responses. Some intraday traders use RSI(9) on 15-minute charts to capture short-term momentum shifts within the session.

Standard period (14): The balanced choice for most traders. It works well for swing traders using daily or weekly charts, and for intraday traders using 15-minute to hourly charts. At this setting, overbought and oversold readings are relatively meaningful because they require a sustained directional move to reach those levels. For most retail traders in India beginning their journey with technical analysis, starting with RSI(14) on daily charts is the recommended approach.

Longer periods (21–25): A 21-period RSI is slower and smoother. It generates fewer signals but the ones it generates tend to have higher conviction behind them. Positional traders who hold for weeks or months, and who are trading large-cap stocks on NSE or BSE, often prefer RSI(21) on weekly charts to filter out short-term noise. The trade-off is that signals arrive later - you will miss some of the early entry, but you get more confirmation.

Adjusting overbought/oversold thresholds to match your period: This is a nuance many beginners miss. When you shorten the RSI period, the indicator oscillates more violently, frequently touching 70 and 30 even in mild trends. To compensate, many traders shift the thresholds outward - using 80 as overbought and 20 as oversold for a 7-period RSI. Conversely, when using a longer period, you might tighten the thresholds to 65 and 35.

Market-specific considerations for India: Equity indices like Nifty 50 and Sensex tend to be smoother and more mean-reverting over shorter timeframes than individual mid-cap or small-cap stocks. Individual stocks, particularly in the SME segment or those with lower free-float, can sustain extreme RSI readings for much longer during momentum-driven moves. Commodity markets on MCX - especially crude oil contracts - can trend powerfully, keeping RSI above 70 for extended periods during supply-shock rallies. Always consider the underlying instrument's character when selecting your RSI period and thresholds.

Finally, remember that changing settings after the fact to make historical signals look perfect is a classic form of overfitting. Pick your settings based on your trading style and stick with them consistently. Discipline in parameter selection is part of sound risk management.

Overbought and Oversold: What These Signals Really Mean

The two most widely cited RSI signals are the overbought reading (RSI above 70) and the oversold reading (RSI below 30). These are also the two most widely misunderstood signals, and misreading them is one of the most common mistakes retail traders in India make - particularly beginners who treat RSI like a traffic light.

The core misconception: overbought does not mean sell immediately, and oversold does not mean buy immediately. It means the instrument has experienced a relatively large proportion of up-moves (or down-moves) in recent periods. In a strong uptrend, RSI can remain above 70 for weeks or even months. If you short every time RSI crosses 70 during a Nifty bull run, you will be stopped out repeatedly.

The correct interpretation depends on the market regime. In ranging, sideways markets, overbought and oversold signals work beautifully as mean-reversion signals. When Nifty 50 is consolidating between clear support and resistance, an RSI reading of 75 often does precede a pullback, and an RSI of 28 often precedes a bounce. Traders using RSI for mean-reversion typically sell the bounce when RSI crosses back below 70 from above, and buy the dip when RSI crosses back above 30 from below - waiting for the crossback rather than acting at the extreme.

In trending markets, you need to adapt your approach. Wilder himself acknowledged this and suggested using a different reference zone. In strong uptrends, RSI tends to oscillate between 40 and 80, with the 40 level acting as support - it rarely drops below 40 in a healthy uptrend. In strong downtrends, RSI tends to oscillate between 20 and 60, with the 60 level acting as resistance. This observation, sometimes called the "bull/bear zone" concept, was later popularised by analyst Constance Brown. Applying it to Indian markets: when the Nifty 50 is in a confirmed weekly uptrend, treat RSI pullbacks to the 40–45 zone on the daily chart as potential buying opportunities, rather than waiting for 30 which may never arrive.

Failed swings - a more advanced signal: Wilder himself placed great importance on what he called "failure swings." A bullish failure swing occurs when RSI falls below 30 (oversold), bounces, dips again but stays above 30 (a higher low), and then breaks above the previous bounce high. This break above the prior RSI peak - called the "failure swing point" - is the actual entry signal according to Wilder, not the initial oversold reading itself. A bearish failure swing is the mirror image. These are more sophisticated signals that filter out many false alarms.

Practical application for Indian intraday traders: On Bank Nifty or Nifty futures during intraday sessions (9:15 AM to 3:30 PM IST), RSI on the 15-minute chart can provide useful momentum context. If the market opens gap-up and RSI is already at 72 on the first 15-minute candle, that is a caution signal - not necessarily a short signal, but it tells you momentum is stretched. Waiting for RSI to pull back into the 50–60 zone before entering long positions often yields better risk-to-reward ratios than chasing an overbought opening.

Always remember: no single reading in isolation is a complete trading signal. The overbought/oversold condition tells you about momentum; your analysis of the overall trend, volume, and key price levels tells you about context. It is the combination that creates a tradeable setup.

RSI Divergence: Spotting Trend Exhaustion Before the Market Confirms It

Of all the signals the RSI produces, divergence is arguably the most powerful - and the most misused. Divergence occurs when the price of an asset and the RSI indicator move in opposite directions. This disagreement suggests that the momentum behind a trend is weakening, even if the price has not yet reversed. Recognising divergence early allows traders to position ahead of potential reversals or to exit winning trades before they turn into losses.

There are two primary types of RSI divergence:

Bearish (Regular) Divergence: Price makes a higher high, but RSI makes a lower high. This is the classic signal that a rally is losing momentum. Each successive price peak is less supported by underlying momentum than the previous one. In practical terms on NSE charts, you might see a large-cap stock make a new 52-week high in price, but the RSI peak on that new high is lower than the RSI peak on the previous high. That mismatch tells you that fewer buyers are participating proportionally - a warning sign that smart money may be distributing shares.

Bullish (Regular) Divergence: Price makes a lower low, but RSI makes a higher low. This signals that selling momentum is weakening even as price grinds lower. On a daily chart of a mid-cap stock that has been in a prolonged downtrend, if the latest price low is below the previous low but the RSI trough is higher, it suggests sellers are losing conviction. This can precede a meaningful recovery rally.

Hidden Divergence (Trend-Continuation Signals): Less well known but extremely useful are hidden divergences, which signal trend continuation rather than reversal. Bullish hidden divergence: price makes a higher low (consistent with an uptrend), but RSI makes a lower low. This tells you the pullback is not gaining real momentum and the uptrend is likely to resume. Bearish hidden divergence: price makes a lower high (consistent with a downtrend), but RSI makes a higher high. This tells you the bounce is weak and the downtrend will likely continue. Hidden divergences are particularly useful for traders who want to add to existing trend-following positions on retracements.

Common mistakes in reading divergence: First, many traders try to draw divergence lines across any two highs or lows without ensuring they are comparable. For a valid bearish divergence, both RSI peaks should be at elevated levels (ideally above 60). For a valid bullish divergence, both RSI troughs should be at depressed levels (ideally below 40). Second, divergence can persist for a long time before price reverses. It is not a precise entry timing tool - it is an alert that something is changing. Third, divergence on lower timeframes (5-minute, 15-minute charts) is far less reliable than divergence on higher timeframes (daily, weekly).

A practical framework for using divergence in Indian markets: When you identify bearish divergence on a daily chart, do not short immediately. Wait for a price-action confirmation - a bearish candlestick pattern, a break below a key moving average, or a breach of a support level. Similarly, bullish divergence on a daily chart should ideally be confirmed by a bullish candlestick reversal pattern or a reclaim of a recent support level before you enter long. This two-step approach - divergence as the alert, price action as the trigger - reduces false starts significantly.

On NSE equity markets, divergence is particularly relevant around earnings season. A stock can make new highs on the back of strong quarterly results, but if RSI divergence is present on the weekly chart, it may indicate that the good news is already priced in and institutional participants are using the strength to exit positions. While this analysis alone cannot be the basis of a trade, it adds an important layer of caution to your decision-making process.

RSI in Trending Markets vs. Ranging Markets

One of the biggest frustrations traders experience with RSI is that it seems to work brilliantly in some market conditions and fail miserably in others. The reason is simple: RSI, as a momentum oscillator, behaves very differently depending on whether the market is trending or ranging. Understanding this distinction is fundamental to using RSI profitably.

In ranging markets, RSI is at its most effective. When price is oscillating between a defined support zone and a resistance zone - a pattern common in the Indian equity market during periods of FII uncertainty or pre-budget consolidation phases - RSI becomes an excellent entry and exit timing tool. Oversold readings near support offer buy signals; overbought readings near resistance offer sell signals. The 70/30 thresholds work well, and mean-reversion setups have a high probability of playing out. Nifty Bank often spends significant stretches of time in range-bound conditions, making RSI particularly applicable during those phases.

In strongly trending markets, the 70/30 thresholds fail as reversal signals. During powerful bull markets - like the one Indian equities experienced from late 2020 through 2021 - indices like Nifty 50 and individual IT and pharma stocks stayed in overbought RSI territory for months. Traders who blindly sold every time RSI crossed 70 suffered repeated losses while the trend continued higher. The correct approach in a strong uptrend is to buy RSI dips to the 40–50 zone (the "bull zone" floor) rather than selling overbought readings.

How to identify the market regime: Several approaches help. First, look at the 50-day and 200-day Simple Moving Averages (SMA). If price is above both and the 50-day is above the 200-day, you are likely in an uptrend - use the bull zone RSI approach. If price is below both moving averages and the 50-day is below the 200-day, you are likely in a downtrend - use the bear zone RSI approach. Second, measure the ADX (Average Directional Index). ADX readings above 25 suggest a trending market where overbought/oversold reversal signals from RSI are less reliable. ADX below 20 suggests a ranging market where those signals are more reliable.

Multiple timeframe RSI analysis: A particularly powerful technique is to check RSI across two or more timeframes simultaneously. For example, before entering a long trade on a 15-minute Nifty futures chart where RSI is pulling back to 45, check the hourly and daily RSI. If both higher timeframes show RSI above 50 in a healthy uptrend, the pullback on the 15-minute chart is more likely to be a buying opportunity. If the daily RSI is declining from 72 and the weekly is also showing bearish divergence, the 15-minute dip to RSI 45 may be the beginning of a larger correction rather than a safe buying opportunity. Alignment across timeframes dramatically improves signal quality.

Practical application for swing traders: Swing traders using daily charts of NSE-listed stocks benefit enormously from combining weekly and daily RSI readings. A simple rule: only take long setups when the weekly RSI is above 50 (confirming the weekly uptrend), and look for daily RSI pullbacks to the 40–50 zone as entry triggers. This approach filters out many counter-trend trades that look tempting in isolation but go against the larger momentum flow. For short setups, reverse the logic: weekly RSI below 50, daily RSI bouncing to 55–65 as a potential short entry zone.

Combining RSI with Other Technical Tools

RSI is most powerful when used in conjunction with other technical analysis tools. As with any single indicator, RSI has blind spots that other tools can help address. Building a confluence-based approach - where multiple independent signals agree before you act - significantly improves your probability of success in Indian markets.

RSI with Moving Averages: Moving averages help define trend direction, and RSI helps time entries within that trend. A common approach: use the 20-day Exponential Moving Average (EMA) and the 50-day EMA to identify trend direction. When price is above the 20 EMA which is above the 50 EMA, the trend is up. Wait for RSI to pull back to the 40–50 zone, confirming a momentum dip rather than a trend change, and enter long as RSI turns back up. This simple combination filters out many false overbought sell signals that fool RSI-only traders.

RSI with Support and Resistance: Key price levels - horizontal support and resistance, trend lines, Fibonacci retracement levels - provide the context that RSI lacks on its own. An RSI reading of 30 (oversold) becomes far more actionable when price simultaneously touches a strong horizontal support level that has held multiple times in the past. Conversely, an overbought RSI reading of 72 is a more credible sell alert if price is simultaneously testing a major resistance zone or a 52-week high with heavy institutional sell interest visible in the order book.

RSI with Volume: Volume confirms or questions the conviction behind a price move. If RSI is rising and so is price, but volume is declining, it suggests the rally is losing participation - a potential warning. If RSI rises alongside price on expanding volume, the momentum signal is more reliable. On NSE and BSE, volume data is freely available and should always be part of your analytical checklist alongside momentum indicators like RSI.

RSI with Candlestick Patterns: Combining RSI divergence signals with Japanese candlestick reversal patterns creates highly specific trade setups. For example: bearish RSI divergence on a daily chart, followed by a Shooting Star or Bearish Engulfing candlestick at resistance - that combination provides three independent reasons to consider a short trade, giving you much more confidence than any single signal. Similarly, bullish divergence confirmed by a Hammer or Morning Star at support is a high-confluence long setup.

RSI with Bollinger Bands: Bollinger Bands measure price volatility by plotting two standard deviation bands around a moving average. Combining them with RSI is popular among intraday traders. When price touches the lower Bollinger Band and RSI simultaneously shows oversold readings below 30, it creates a double-confirmation oversold signal. If price then produces a reversal candlestick, many traders consider this a strong enough signal to act on. The opposite logic applies at the upper band.

RSI with MACD: Both RSI and MACD are momentum-based tools, but they measure slightly different aspects of momentum. RSI measures price change relative to its own recent history; MACD measures the relationship between two moving averages. When both confirm the same signal - for example, RSI showing bullish divergence while MACD histogram is also bottoming out and turning positive - the combined signal is more robust than either alone. Some traders require both to confirm before entering a trade, accepting fewer setups in exchange for higher quality.

A word of caution: adding more indicators does not automatically improve your results. Each additional indicator you add to your chart increases complexity and can lead to analysis paralysis. The goal is confluence, not confusion. Most successful retail traders in India use two or three complementary tools - RSI plus one trend tool plus one price action confirmation - and master those combinations rather than piling on six or seven different oscillators.

RSI for Different Trading Styles: Intraday, Swing, and Positional

One of RSI's greatest strengths is its adaptability across different trading timeframes and styles. However, the way you apply RSI should differ significantly depending on whether you are an intraday trader, a swing trader, or a long-term positional trader. Let us walk through each style in the Indian market context.

Intraday Trading (NSE and BSE): Intraday traders work with compressed timeframes - typically 1-minute, 3-minute, 5-minute, or 15-minute charts. The Nifty 50, Bank Nifty, and Nifty Financial Services contracts on NSE are among the most actively traded intraday instruments in India, with extremely high liquidity enabling tight spreads. For intraday RSI analysis, the 15-minute chart with RSI(14) is a popular combination. The key technique is to establish the direction of the broader session trend (morning session tone, overnight global cues, pre-market Nifty levels), and then use RSI pullbacks on the 15-minute chart to time entries in the direction of that trend. RSI overbought/oversold on 5-minute charts alone is generally too noisy; the 15-minute timeframe provides a better balance of responsiveness and reliability. SEBI's intraday margin regulations mean traders must manage position sizes carefully, and RSI helps by providing clearer entry zones that allow tighter stop-loss placement.

Swing Trading (2 to 10 Days): Swing traders aim to capture directional moves lasting a few days to a couple of weeks. The daily chart is the primary analytical timeframe, with the weekly chart providing broader context. RSI(14) on the daily chart is the standard setting. Swing traders look for RSI pullbacks in trending stocks - buying dips to the 40–50 RSI zone in uptrending stocks, or selling bounces to the 50–60 zone in downtrending stocks. Divergence on the daily chart is highly relevant for swing traders because it can signal the end of a multi-week move. Since swing trades are held overnight, traders must also be mindful of gap risk - the fact that Indian stocks can open significantly higher or lower the next day due to global developments. Using RSI to identify high-probability zones (such as strong support levels combined with oversold RSI) helps manage this gap risk by improving the expected value of the trade even accounting for potential adverse gaps.

Positional Trading (Weeks to Months): Positional traders focus on weekly and monthly charts. RSI(14) on weekly charts is a powerful tool for spotting major momentum shifts in large-cap stocks or sectoral indices. A weekly RSI that crosses above 50 after a prolonged downtrend can signal the beginning of a new uptrend phase. Weekly RSI divergence, while rare, tends to be highly significant - reflecting genuine institutional accumulation or distribution patterns. Positional traders also benefit from watching monthly RSI readings, particularly for identifying secular overbought or oversold extremes in broad market indices like the Nifty 50 or Sensex. For tax purposes, positional trades held longer than one year qualify for long-term capital gains treatment under Indian tax law - refer to the latest Finance Act for current applicable rates and threshold limits.

Common RSI Mistakes and How to Avoid Them

Even experienced traders make RSI mistakes. Being aware of the most common pitfalls can save you significant losses and frustration, particularly in the dynamic conditions of Indian equity and commodity markets.

Mistake 1 - Treating every overbought/oversold reading as an automatic signal: As discussed extensively in this guide, RSI remaining above 70 in a strong uptrend is entirely normal. Selling every time RSI crosses 70 without contextual analysis is one of the most costly mistakes intraday and swing traders make in bullish trending markets. The fix: always assess the broader market regime before interpreting RSI extremes. Ask whether you are in a trending market or a ranging market before deciding how to respond.

Mistake 2 - Looking for divergence on short timeframes: RSI divergence on 1-minute or 5-minute charts is extremely common and unreliable. The noise-to-signal ratio is too high at these compressed timeframes. Many beginners see what appears to be textbook bearish divergence on a 5-minute chart, short the instrument, and then get stopped out when the price continues higher. The fix: reserve divergence analysis for 1-hour charts and above. The daily and weekly charts provide the most reliable divergence signals.

Mistake 3 - Drawing divergence across incomparable pivots: Valid divergence requires that you compare peaks to peaks (for bearish divergence) or troughs to troughs (for bullish divergence), and that both pivot points be clearly defined. Some traders stretch the divergence concept by comparing a minor intraday blip to a major swing high, which is analytically meaningless. The fix: be strict about which pivots you draw your divergence lines across. Both points should be clear, significant swings in both price and RSI.

Mistake 4 - Ignoring volume: RSI measures price momentum, but price moves unsupported by volume are less reliable. A stock that shows an oversold RSI reading while prices are falling on extremely thin volume might simply be drifting lower due to illiquidity, not genuine institutional selling - the dynamics are different. The fix: always cross-reference RSI signals with volume analysis before committing to a trade.

Mistake 5 - Curve-fitting the period setting: Some traders keep adjusting the RSI period until historical signals look perfect on their chart. An RSI(11) might have called every top and bottom perfectly in a particular stock over the past year, but that does not mean it will continue to do so in the future. The fix: use standard period settings (14 or 21) that are widely observed by the market, ensuring your signals occur at levels that other participants are also watching.

Mistake 6 - Acting on RSI without a trading plan: RSI tells you about momentum and potential reversal zones, but it does not tell you how large a position to take, where to place a stop loss, or what your profit target is. Many traders enter positions based on RSI signals without thinking through their risk-reward ratio in advance. The fix: define your complete trade plan - entry trigger, stop-loss level, target level, and position size - before you enter. Never let the excitement of a flashing RSI signal cause you to skip this essential step.

Mistake 7 - Using RSI for fundamental or event-driven moves: Corporate earnings announcements, RBI policy decisions, Union Budget announcements, and geopolitical events can cause sharp price moves that completely override technical levels. RSI cannot predict these events. If a stock gaps down 10 percent at the open due to disappointing quarterly results, an oversold RSI reading the previous evening provided no useful warning. The fix: be aware of scheduled events (earnings dates, FOMC/RBI meeting dates) and consider reducing position sizes or avoiding new entries around these catalysts.

RSI in Commodity and Currency Markets on MCX and NSE Currency Segments

While RSI is most commonly associated with equity markets, it is equally applicable and widely used in India's commodity and currency markets. Understanding the nuances of RSI application in these segments can open up additional trading opportunities.

Commodity Markets on MCX: The Multi Commodity Exchange of India (MCX) facilitates trading in gold, silver, crude oil, copper, zinc, and agricultural commodities. Each of these commodities has distinct fundamental drivers - gold responds to global risk sentiment and the US dollar, crude oil responds to OPEC decisions and global demand, agricultural commodities respond to monsoon patterns and MSP announcements. RSI on MCX charts helps traders time entries and exits within these macro-driven trends, but the fundamental backdrop must always be considered alongside the technical signal.

Gold and Silver on MCX: These precious metals tend to be strongly trending when global uncertainty is high, and range-bound during periods of stability. During trending phases, the bull zone/bear zone RSI approach (40 as support in uptrends, 60 as resistance in downtrends) works better than the standard 70/30 thresholds. During range-bound phases, the 70/30 levels can be effective mean-reversion triggers. Gold's high correlation with the USD/INR exchange rate also means that RSI signals on gold MCX contracts should ideally be cross-referenced with USD/INR chart analysis.

Crude Oil on MCX: Crude oil is one of the most volatile commodities on MCX. During supply-shock events (such as geopolitical disruptions in oil-producing regions), crude can sustain RSI readings above 70 for extended periods. False reversal signals from overbought RSI readings can result in significant losses if acted on without confirming price action. For crude oil, wider thresholds (80/20 instead of 70/30) and stricter confirmation requirements are advisable.

Currency Segment on NSE: Currency derivatives in India trade on NSE and BSE, with USD/INR being the most liquid pair. RSI analysis on USD/INR daily charts helps traders identify when the rupee is becoming significantly extended in one direction - information relevant not just for currency traders but also for equity investors with import/export-sensitive holdings. RBI's active intervention in the currency market means that extreme RSI readings in USD/INR sometimes get arrested by central bank action, adding an additional layer of fundamental context that purely technical traders must respect. Always keep an eye on RBI communications and scheduled policy announcements when trading currency derivatives.

Agricultural Commodities on NCDEX: The National Commodity and Derivatives Exchange (NCDEX) facilitates trading in agricultural commodities like chana, guar, castor seed, and soybean. These markets are relatively less liquid than MCX metal and energy contracts, which affects RSI reliability - with lower liquidity, individual large orders can create sharp price spikes that register as false RSI signals. Traders in agricultural commodity derivatives should use RSI as one input among many, paying particular attention to seasonal patterns, monsoon data from the India Meteorological Department, and government policy announcements regarding MSPs and import/export duties.

Example

Key benefits

How it works

1. 1
   Calculate Average Gains and Losses

   Over your chosen lookback period (default 14), separate each period's price change into gains and losses, then calculate the average gain and average loss using Wilder's smoothing method (RMA).

2. 2
   Compute the Relative Strength (RS)

   Divide the Average Gain by the Average Loss to get the RS ratio, which reflects the proportional dominance of upward price moves over downward price moves in the lookback period.

3. 3
   Normalise to the 0–100 Scale

   Apply the formula RSI = 100 − [100 ÷ (1 + RS)] to convert the RS ratio into a value between 0 and 100. Readings above 70 indicate overbought conditions; readings below 30 indicate oversold conditions.

4. 4
   Plot and Observe the RSI Line

   The RSI value is plotted as a continuous line on a sub-chart below the main price chart. Watch how the RSI line moves relative to the 70, 50, and 30 reference levels as price evolves.

5. 5
   Identify the Market Regime

   Determine whether the instrument is trending or ranging using moving averages or ADX. This context determines whether to use RSI for trend-following entries (bull/bear zone approach) or mean-reversion trades (70/30 threshold approach).

6. 6
   Scan for Divergence Signals

   Compare RSI swing highs and lows with corresponding price swing highs and lows. When they disagree in direction, divergence exists - a potential signal of trend exhaustion or continuation depending on the divergence type.

7. 7
   Confirm with Additional Tools and Enter

   Never act on an RSI signal alone. Seek confirmation from price action (candlestick patterns), key support/resistance levels, volume, or complementary indicators before committing to a trade, and always define your stop-loss and target in advance.

Formula

RSI = 100 − [100 ÷ (1 + RS)]
Where RS (Relative Strength) = Average Gain over N periods ÷ Average Loss over N periods (using Wilder Smoothing; default N = 14)

Key takeaways

Frequently asked questions

Related terms