Visual comparison of repainting versus non-repainting trading signals on a candlestick chart
Repainting indicator — what the history shows vs what actually happened
Bullish candle
Bearish candle
Buy signal (historical — phantom)
Signal absent in real time
The indicator retroactively placed a buy signal on Apr 3 after seeing Apr 4 and Apr 5 data. In real time, no signal existed.
What happens to you: The historical backtest shows 94% accuracy. You trust it. You go live. The signals appear mid-candle and vanish when the candle closes. You enter on a phantom arrow and the market moves against you. The indicator was using future data to rewrite its own history.
Non-repainting (Syntium Algo) — signal prints once, stays permanently
Bullish candle
Bearish candle
Buy signal (permanent — closed bar)
Signal consistent across both views
The signal printed the moment the Apr 3 candle closed. It has not moved, shifted, or disappeared — in historical view or real time.
What happens to you: The signal prints on candle close. You enter on the next candle open. The signal stays exactly where it was — in both your live chart and your historical backtest. What you tested is what you trade. Your risk management plan holds because the data it is built on never lies.