CRTLAB
The most realistic way to backtest your trading setups
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CRTLAB - The most realistic way to backtest your trading setups

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CRTLAB is a browser-based backtesting and market replay platform for traders. Replay real historical price data candle by candle across 8 markets (forex, indices, gold, crypto), test your setups with pro drawing tools and a live replay engine, and sharpen your edge before risking real money. Free to start — no card needed. Pro unlocks 10 years of data per pair plus the full CRT × Mitigation strategy and ICT course.

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Hey everyone, I built CRTLAB because I was tired of not knowing whether my trading setups actually worked. Reading about a strategy and actually testing it 200 times are completely different things. CRTLAB lets you replay real historical market data candle by candle — you watch setups develop in real time, just like live trading, so you can test your edge before risking real money. It's free to start (no card), works right in the browser, and covers forex, indices, gold, and crypto. Pro unlocks 10 years of data per pair plus the full strategy + ICT course. Would love your feedback.

Replayed a forex pair candle by candle this morning and the drawing tools actually feel responsive, not laggy like some other backtesters I have tried. The ICT course tie-in is a nice touch for someone still learning CRT concepts.

How does the replay engine handle spreads and slippage during historical playback, and can you toggle commissions on or off per trade?

How does the replay engine handle overnight gaps or low-liquidity sessions, do candles just skip or do they fill in somehow?

how fast does the live replay engine move between candles, and can I slow it down to mimic real chart speed while I practice spotting order blocks?