Supertrend Indicator: Settings, Formula and Trading Guide

The first time you see Supertrend, the chart finally feels simple. Green means buy, red means sell. Then the market goes sideways, the line flips three times in two days, you get stopped out twice, and you start frantically changing the settings out of frustration. That moment — when the simple tool suddenly feels personal — is what this article is really about.

Supertrend lives directly on the candles in Zerodha Kite, TradingView and most other charting apps. It does not need a separate panel like RSI or MACD. The single coloured line is the whole indicator, which is exactly why it has become the most popular tool on retail charts in India.

The trouble starts when beginners treat each colour flip as a guaranteed buy or sell. Supertrend changes colour when its formula crosses to the other side of price — which is not the same thing as your reason for the trade actually changing.

In a clean trend the two are the same thing. In a sideways market the two are very different, and that gap is where most new traders bleed out.

What Supertrend actually does

Supertrend is widely credited to the French trader Olivier Seban, who is usually said to have popularised it around 2009. Today it is a free, built-in indicator on most charting platforms, which is a big part of why it spread so fast among Indian retail traders. The idea behind it is simple. Take the average size of the last ten candles, and use that as a trailing band around price.

When price is rising, the band sits below the candles and acts as a green stop-loss line. When price is falling, the band sits above the candles and acts as a red resistance line. The price has to push through the band before the indicator agrees that the trend has changed.

That is the whole idea. Supertrend is a smart trailing stop dressed up as a buy-sell signal. The colour you see on the chart is just whichever side of price the band is currently pinned to.

The most important thing to internalise is what Supertrend is not. It is not a forecast. It does not predict the next move.

It tells you, with one or two candles of confirmation, that the prevailing trend has flipped. The price you pay for that confirmation is the first two candles of the new move, and the candles you miss are the most uncertain ones.

How Supertrend is actually built

You will never calculate Supertrend by hand and you should not need to. Every charting platform does it for you. But knowing what is inside the box makes the line on the chart far less mysterious.

Supertrend has two inputs that you can change. The first is the period for the Average True Range, the ATR, which is the average size of a candle over the last few sessions. The default is ten periods. The second is the multiplier, also called the factor, and the default is three.

For each candle, the platform computes the midpoint of the candle, which is the average of the high and the low. Then it adds three times the ATR to that midpoint to get an upper band. Then it subtracts three times the ATR to get a lower band.

Those two bands are the two possible places where the Supertrend line can sit. The platform then asks one question on every candle. Is price currently above the previous upper band or below the previous lower band?

If price is above the lower band, the line locks on to that band. The line is green, sits under the candles, and acts as a trailing stop. If price closes through that band, the line flips up to the upper band, turns red, and acts as a trailing resistance.

The bands themselves keep updating with every new candle. The lower band ratchets up as price rises, never down. The upper band ratchets down as price falls, never up. That one-way ratchet is what gives Supertrend its smooth trailing behaviour.

Once you see this, the colour flips stop looking like magic. Supertrend is locked on to a price-distance threshold. When price closes through that threshold by enough, the indicator switches sides. That is all.

The default settings and when to change them

The classical setting is ten and three. Ten periods for the ATR, factor of three for the band width. This combination has stayed the default on Indian charting platforms for over a decade.

Most traders should leave it alone. The default is well-tuned for the daily charts of Nifty, Bank Nifty and large-cap NSE stocks like Reliance, HDFC Bank, Infosys and TCS. Changing it without a clear reason is the fastest way to overfit your indicator to the last two months of data.

Still, the settings do something specific, and knowing what they do is worth a moment. A higher factor pushes the bands further from price. The line sits further away, flips less often, and produces fewer but bigger signals.

A lower factor pulls the bands in closer. The line hugs price more tightly, flips more often, and produces more but smaller signals. Most of those extra signals in a sideways market are whipsaws.

The ATR period works on a similar logic. Shorter periods react faster but pick up more noise. Longer periods smooth out the noise but lag the move.

For intraday on a 5 or 15 minute chart, the 7-period, factor-2 setting is common. It picks up faster moves but you have to accept many more false flips. For positional swing trading on the daily, ten and three is the sweet spot.

For investing-style position trades on the weekly chart, traders sometimes use 14 and 3 or even 20 and 5 to ride very long trends. The point is that the chart and the timeframe should pick the setting, not your impatience with the default.

Reading the buy and sell flips

The textbook rule is the easiest part of Supertrend. When the line flips from red to green, it is a buy. When it flips from green to red, it is a sell.

The flip is the signal, not the colour itself. A green line that has been green for fifteen sessions is not a buy. A green line that just turned green on the last candle, after being red, is the buy.

The same goes for the short side. A red line that just turned red is the sell signal. A red line that has been red for two weeks is just confirming that you should not be long.

Nifty 50 on the daily chart in 2024 gave a textbook example. After a choppy phase in January and early February, the Supertrend line flipped to green on a strong daily close around February, with the index near 22,000. From there Nifty climbed over the following months, reaching the 23,300 area by early June, and the line held green through most of that advance. Several shallow pullbacks probed the green line and bounced.

Reliance through the first half of 2023 gave the same shape. The 10-3 daily Supertrend stayed green from around February into July, with the stock climbing from the low ₹2,200s to an all-time high near ₹2,635 in July. The eventual red flip then marked the start of a multi-month consolidation. (One thing to know: after Reliance's 1:1 bonus issue in late 2024, today's charts show those 2023 prices at roughly half, so do not be thrown if a live chart looks different.)

Red flips work the same way in reverse. When a stock that has been trending up finally closes below its green line, Supertrend turns red and starts trailing the new downtrend from above — the same clean behaviour, just on the short side. The skill is identical in both directions: you are waiting for a fresh flip, not reacting to a colour the chart has been showing for weeks.

The whipsaw trap

If Supertrend is so clean in a real trend, why does it not make every trader rich? Because most markets, most of the time, are not trending. They are stuck in a range.

In a range, price keeps poking through the bands and Supertrend flips colour every few candles. Each flip is a fresh buy or sell signal that all lose small amounts of money. Stack ten of those losses in a row and the small fees and slippage add up to a real dent in the account.

This is the whipsaw, and it is the single biggest problem with Supertrend. It is also predictable. Sideways markets whipsaw any trend-following indicator, but Supertrend's clean visual flips make the losses feel especially personal.

Nifty often spends long stretches of the year going sideways rather than trending. During those phases, blindly trading every Supertrend flip is a slow drain on the account. The same setup that printed money in a trending month prints losses in a range-bound one.

The fix is not to dump the indicator. The fix is to use a separate filter that tells you whether you are in a trending market at all.

The two most common filters are the ADX and the 200-day moving average — both explained in the box near the top. As a rough rule of thumb, an ADX reading above about 25 says a real trend is present, while a reading below 20 says the market is just chopping and Supertrend signals are best skipped. If price is above its 200-day average, prefer the green flips and ignore the red ones; if price is below it, prefer the red flips and ignore the green ones.

That one filtering rule turns Supertrend from a noisy machine into a usable tool. You give up the trades that were never going to work anyway, and you keep the trades where the line is doing its actual job.

How to actually trade with Supertrend

Once the framework is clear, the rules become straightforward. Supertrend is not a stand-alone system. It is a clean trailing stop that you wrap around a trade your other tools have already validated.

Use it for three jobs, in this order. Decide whether you should be looking for a trade at all, decide which side to take when a flip arrives, and decide where to exit while you are in the trade.

For the first job — reading the market condition, what traders call the regime — glance at ADX or the 200-day moving average before you even look at Supertrend. If the market is choppy, set Supertrend signals aside for that name and trade something else. If a clear higher-timeframe trend is in place, the flips on the lower timeframe earn their place.

For the entries, when a flip arrives in the direction of the higher-timeframe trend, wait for the next candle to confirm. A strong up-candle that fully covers the previous one, a higher low than the last dip, or a clear break above the recent high all add price-based evidence that the flip is real and not just noise.

For the exits, the indicator does its best work. Trail your stop just below the green line on a long position, and just above the red line on a short. When the line flips against you, you are out. The same line that got you in is the line that takes you out.

One small practical note. Resist the urge to combine Supertrend with three or four other trend indicators. Moving averages, MACD, Supertrend and ADX all measuring some version of trend will agree most of the time and disagree exactly when you most need a clean call.

Supertrend plus one trend filter plus one price-based confirmation is already a complete system. Adding more layers makes the signals look more impressive on a backtest and perform worse in live trading.