Bar replay: practise on real charts, one candle at a time
Bar replay hides every candle after a date you choose and reveals price one bar at a time, so a historical chart behaves the way the market did when it was live. You place the trade before you know the outcome, which is the only way practice on past data means anything.
Real BTC data, in the browser, no account and no card. Step the chart forward and take a trade.
0 trades of famous setups run with fees on, and what survived.
What bar replay actually is
A normal chart shows you the whole move at once. That is fine for analysis and useless for practice, because you cannot unsee the right answer. Bar replay solves it by rewinding the chart to a chosen moment and hiding everything after it. You then advance the chart yourself, candle by candle, deciding what to do with only the information a trader had at the time.
The mechanic is simple, but it changes the exercise completely. Setups that look obvious in hindsight become ambiguous while they are forming. Trades you were sure you would have taken turn out to be trades you would have skipped, and the ones you would have taken often fail. That gap between remembered skill and measured skill is the whole reason replay exists.
How a replay session works
- 1Pick a market and a date
Choose the instrument and the moment in history you want to trade. The chart loads with everything after that date hidden, so there is nothing to peek at.
- 2Step the chart forward
Advance one candle at a time, or let it play at a speed you choose. Price arrives the way it does live: incomplete, ambiguous, and without the benefit of knowing what the next bar does.
- 3Take the trade properly
Place market, limit or stop orders with a stop loss and target, size the position, and manage it as the bars print. Partial closes and trailing stops behave the way they would with a broker.
- 4Review what actually happened
Every simulated trade is recorded with entry, exit, R multiple and result, so the session ends with data instead of an impression. Push the session to your journal and the same analytics apply.
Where each replay tool fits
An honest read of the options, including the ones that are not us.
What makes replay practice worthless
The most common substitute for replay is dragging a live chart into the past. It does not work, because the rest of the move is one scroll away and your eye has already seen it. Hindsight quietly turns every setup into an obvious one.
If the entry criteria change mid-session, the result measures your mood, not the strategy. Write the rules down before the first candle and take every signal they produce, including the ones you dislike.
Ten replayed trades tell you almost nothing. The gap between a 40% and a 55% win rate needs a few hundred trades before it is distinguishable from luck, which is exactly why replay is useful: it compresses months of sample into an afternoon.
A strategy that clears its spread and commission is a different strategy from one measured gross. In our own mechanical study of famous setups across 0 trades, the fee line was the difference between promising and unprofitable.
A replay routine that produces evidence
Decide the single setup you are testing and write its entry, stop, target and invalidation in one sentence each. Pick a period you have not studied. Replay it in sessions of thirty to fifty trades, taking every signal the rules produce and skipping everything else, however tempting. Log each trade as it closes, then read the sample as a whole rather than trade by trade: win rate, average R, profit factor, and the worst run of losses in a row.
The number that matters most is expectancy after costs, because it is the one that survives contact with a broker. If the sample is profitable, repeat it on a different period before you believe it. If it is not, you have learned that cheaply, which is the point.
Questions
What is bar replay?
Bar replay is a chart mode that hides all price after a chosen historical date and then reveals it one candle at a time, so you can practise reading a market and placing trades as though it were live. It removes hindsight, which is what makes scrolling back on an ordinary chart useless for practice.
Is bar replay free?
On this site the replay simulator runs free in the browser on real BTC data with no account and no card. A Pro subscription adds the other markets, longer history, more indicators and saved sessions, but the core replay practice costs nothing.
Is bar replay the same as backtesting?
Bar replay is manual, discretionary backtesting. You take each trade yourself, so it tests your execution and judgement as well as the rules. Automated backtesting runs coded rules over the same history in seconds and tests only the rules. Most traders need both: replay to build the read, automation to get a large sample quickly.
How is this different from TradingView bar replay?
TradingView bar replay is a charting feature, so trades you take inside it are not kept as a performance record. Here the replay is a trading simulator: orders, stops, partial closes and costs are modelled, and every session produces a trade log with win rate, profit factor and expectancy that feeds the same journal and analytics as your live trades.
How long does it take to replay a year of data?
That depends on the timeframe. Replaying a year of daily candles is a short session; a year of 1-minute candles is hundreds of thousands of bars and is normally sampled rather than replayed end to end. A practical routine is to replay the specific sessions or setups you trade, not every bar the market printed.
Does replay practice actually improve results?
It builds two things that are hard to get any other way: a large sample of repetitions in the exact conditions you trade, and an honest record of what your decisions produced. It cannot supply live emotion or real slippage, so the standard progression is replay first, then forward testing on a simulated account, then small live size.
Replay a real market now
The simulator runs on real BTC history in your browser. No account, no card, nothing to install.
Start the free replay