What the RSI indicator actually tells you (and what it doesn't)

The RSI (Relative Strength Index) is a momentum indicator that measures how fast and how far price has moved over the last 14 candles, on a scale from 0 to 100. A reading above 70 is called overbought and a reading below 30 is called oversold. It describes how stretched the recent move is. It does not predict where price will go next.

What is RSI in the share market?

RSI was published by J. Welles Wilder in 1978 and it is still one of the first tools a new trader meets. It sits in a small panel under the price chart as a single line that moves between 0 and 100.

The idea is simple. Over a fixed number of candles, the indicator adds up how much price gained on the up days and how much it lost on the down days. If the gains are much larger than the losses, the line moves toward 100. If losses dominate, it moves toward 0. When gains and losses are roughly equal, the line sits near 50.

In the video, Vikas explains that there are thousands of indicators, and that the question he hears most from students is which one to actually use. His answer for beginners is RSI, because it gives a clear, visual way to think about entry and exit rather than guessing. That is a fair place to start, as long as you understand what the line is and is not saying.

The 14-period default

Most charting apps set RSI to 14 periods. A period is one candle on whatever timeframe you are viewing. On a daily chart, 14 periods means the last 14 trading days. On a 5-minute chart, it means the last 70 minutes.

Shortening the period (say to 7) makes the line jump around more and gives more signals, most of them noise. Lengthening it (to 21 or 28) smooths the line and gives fewer signals. There is no correct setting. The default exists so that everyone is looking at the same thing, which matters more than any small edge from tweaking it. Learn the default first.

How do you read the 70 and 30 zones?

Vikas describes the two levels the way most traders do. When RSI drops to 30 or below, the sellers have been in control for a while and the move may be stretched, so a buyer starts looking for an entry. When RSI climbs to 70 or above, the buyers have been in control and the move may be stretched, so a holder starts thinking about booking profit or a seller starts looking for an entry. He treats 50 as the halfway mark where a bounce from 30 might be partially booked.

Notice the word "may". Oversold does not mean cheap, and overbought does not mean expensive. RSI 28 tells you price has fallen hard recently. It says nothing about whether the fall is finished.

What a reading near 50 means

Between 40 and 60, RSI is telling you almost nothing. Gains and losses are balanced. Vikas makes this point too: people who open a position with RSI at 50 have no read on momentum at all, which is why they cannot explain why they entered. The zones matter because they mark the extremes, not because the number itself is special.

Why overbought is not a sell signal in a trend

This is the mistake that costs beginners the most money with RSI.

In a strong uptrend, RSI can sit above 70 for days or weeks. Every candle closes higher, gains keep outweighing losses, and the line stays pinned near 75 or 80 while the stock keeps rising. Vikas notes in the video that RSI can reach 80 or 85 and that what it means depends on the timeframe you are watching. Selling short every time RSI crosses 70 in that situation means shorting the strongest stock on the screen.

The reverse is true in a downtrend. RSI can stay below 30 while price keeps falling, and each "oversold" reading tempts a buyer into a stock that has not stopped going down.

So RSI has two very different uses depending on market structure:

• In a range, where price is bouncing between a floor and a ceiling, the 70/30 zones work as intended. Overbought near the ceiling and oversold near the floor line up with the levels.
• In a trend, use RSI to spot pullbacks in the direction of the trend. In an uptrend, a dip of RSI to 40 or 45 often marks a pause, not a reversal. Above 70 is simply confirmation that the trend is strong.

The indicator is the same. The context decides what it means. This is why no serious trader uses RSI alone.

What RSI divergence adds

Divergence is when price and RSI disagree.

• Bearish divergence: price makes a higher high, but RSI makes a lower high. Price is still rising, but with less momentum behind each push.
• Bullish divergence: price makes a lower low, but RSI makes a higher low. Price is still falling, but the selling is losing force.

Divergence is a warning, not a trigger. It tells you the move is tiring. It does not tell you when it will end, and strong trends can show divergence for weeks before anything changes. Treat it as a reason to tighten a stop-loss or to stop adding, not as a reason to trade against the trend on its own.

A worked example with SBI

Take a daily chart of SBI and imagine the stock is at ₹500. Over three weeks it slides to ₹470, and RSI(14) reads 27. Nothing has told you the fall is over. What RSI has told you is that the selling is stretched, so this is a place to watch for a reversal candle or a bounce from a known support level, not a place to buy blindly.

Suppose price does bounce. Two weeks later SBI is back at ₹500 and RSI is at 52. In Vikas's framework, a buyer who entered near ₹470 with a stop below the low might book part of the position here, because the stretched condition has fully unwound.

Now suppose the stock keeps going. It reaches ₹560 and RSI hits 74. A beginner sells short because "it is overbought". The stock spends the next two weeks between RSI 70 and 78 and climbs to ₹590. That short is under water the whole time. The higher-timeframe trend was up, and above 70 was confirming strength, not signalling a top.

Finally, SBI pushes to ₹600 but RSI only reaches 68, below its earlier peak of 78. That is bearish divergence. It is not a sell signal by itself, but it is the moment a holder should be reviewing the stop, and it is the moment a would-be short should start looking for a break of structure to confirm the idea.

These are illustrative numbers, not a view on SBI. They show how the same indicator reads differently at each stage.

RSI indicator kaise use kare: a simple routine

If you want to use RSI (RSI indicator kaise use kare means "how to use the RSI indicator"), a routine that keeps it in its place looks like this:

1. Pick one timeframe and stay on it. Vikas points out that RSI works on any timeframe, from 5-minute to daily, but a reading on one timeframe says nothing about another.
2. Decide whether the chart is trending or ranging before you look at the indicator.
3. In a range, look at the 70/30 zones near the range edges. In a trend, look for pullbacks toward 40 to 50 in the trend direction.
4. Enter only with a stop-loss and a position size you have worked out in advance. The one percent rule is a sensible default.
5. Record every trade and the RSI reading at entry. After a few months you will know whether the indicator is helping you or just giving you a reason to click.

The free Trading for Everybody course walks through this in Hindi with live charts if you would rather see it than read it.

Common mistakes

• Buying every dip to 30. In a downtrend, oversold gets more oversold. Check structure first.
• Selling every rise to 70. In an uptrend, this is shorting strength.
• Changing the period until it fits past charts. A setting that matches last month perfectly is fitted to noise.
• Using RSI on a 1-minute chart. On very short timeframes the line whips between the zones constantly. Signals are cheap and mostly wrong.
• Trading the indicator instead of the price. RSI is derived from price. Price is the primary source. If they disagree, price wins.
• Expecting a hit rate. No indicator has a reliable success rate, and anyone quoting one for RSI is guessing. Most people who trade lose money, and RSI does not change that on its own.

Key takeaways

• RSI measures the strength of the last 14 candles on a 0 to 100 scale. It describes, it does not predict.
• 70 and 30 mark stretched conditions, not buy and sell signals.
• In a trend, RSI can stay above 70 or below 30 for a long time. Read it with the higher-timeframe trend.
• Divergence warns that momentum is fading. It is a reason to manage risk, not a reason to reverse.
• Use it with structure, a stop-loss and fixed position sizing, or do not use it at all.