Indicator training
RSI Indicator Simulator
Read candles and the RSI beneath them on a price series generated in your browser, with every exit from the overbought and oversold zones marked.
Important: Every candle is invented by a seeded generator, not market data. It shows how the indicator behaves and cannot be used to judge a real instrument.
How to read the RSI under a chart
The Relative Strength Index compares the size of recent gains with the size of recent losses over a fixed number of candles, then expresses that balance on a scale from 0 to 100. A reading near 70 means gains have dominated the window; a reading near 30 means losses have. It measures what price has already done, so it always describes the recent past.
What the arrows mark
An arrow appears on the candle where the indicator leaves an extreme zone: crossing back above the oversold level, or back below the overbought level. Traders watch these moments because the balance of recent candles has just shifted. The arrow records that shift and nothing more. It is not an entry, and the simulator deliberately shows you how often the move afterwards went the other way.
Overbought does not mean expensive
Switch the market character to a steady uptrend and watch what happens: RSI reaches the overbought zone early and keeps returning to it while price continues higher for many more candles. An oscillator was designed for markets that swing inside a range, and a strong trend is exactly the condition where extreme readings persist instead of reversing. This is the single most common way the indicator is misread.
Change one setting at a time
A shorter period reacts faster and produces far more zone exits, most of them noise. A longer period smooths the line and marks fewer, slower turns. Moving the levels to 80 and 20 makes the marks rarer and more selective. Keep the seed fixed while you change a setting so you are comparing the same price series, then change the seed to check whether what you noticed survives on a different chart.
These candles are not a market
The price series is generated locally from the seed you can see, using a simple model of alternating swings. It has no spreads, no news, no liquidity gaps, and no relationship to any real instrument. Use it to build intuition for how the indicator responds to price, then verify everything on a real chart and a demo balance before it informs any decision.