---
title: "8. Practice on past candles with Bar Replay"
slug: "bar-replay"
kind: "HELP_ARTICLE"
category: "charts"
locale: "en"
canonical: "https://help.forecastcity.com/charts/bar-replay"
published: "2026-11-14T18:58:10.289Z"
updated: "2026-11-14T18:58:10.289Z"
description: "Practice on historical candles with Bar Replay in 4CM-AI Charts: use Blind chart mode, Random bar, synced multi-timeframe stepping, and intrabar animation."
---

# 8. Practice on past candles with Bar Replay

Practicing on an old chart where you already know the market and outcome tricks your eyes with hindsight bias. **Bar Replay** in **4CM-AI Charts** rewinds history so you step forward one candle at a time (a bar is one candle). You can hide the ticker and date in blind mode, and step multi-timeframe grids together without leaking future candles.

## Start Bar Replay and step through candles

Click **Replay** in the top toolbar or press `Alt+B` to open the floating replay controls near the bottom of your chart.

![ETHUSD 1h in Bar Replay mode with future candles hidden and the bottom replay toolbar showing starting point, step, sync, animation, and speed controls.](https://m.forecastcity.com/t/tnt_forecastcity/media/22/22c01e36058998f4faad27832a3266fde68ddcf3e57acb7de81c40664802c4f1.png)

ETHUSD on 1h in Bar Replay mode, ready to step forward one candle at a time.

1.  **Select starting point:** opens the five ways to choose where your replay begins.
    
2.  **Step forward** and **Play:** step back (`Shift+←`), play or pause (`Shift+↓` or `Space`), or step one candle forward (`Shift+→`).
    
3.  **Multi-chart Sync:** switch the link icon between this chart alone, same-symbol panels (default), or all panels. Click **Intrabar animation** to watch each candle form smoothly from lower-timeframe data.
    
4.  **Replay speed:** pick a speed from `0.5×` to `10×`, check the replay clock, or click **Exit replay** (`Alt+B`).
    

## Five ways to pick your starting candle

Click **Select starting point** on the left of the replay toolbar to choose how you rewind.

![The Select starting point menu in Replay showing the five rewind and blind practice modes.](https://m.forecastcity.com/t/tnt_forecastcity/media/c0/c01571729bdd88ea158d49794abc5c09c6eb7fa1b3ed8b170c6ec6fa0fb28c50.png)

Pick a specific candle, a calendar date, the earliest candle, a random point, or a fully masked Blind chart.

1.  **Bar:** turns your cursor into scissors so you can click any visible candle as your cutoff point.
    
2.  **Date...:** opens a date and time picker in the chart's timezone so you can jump to a past session.
    
3.  **First available date** and **Random bar:** rewind to the start of loaded history, or jump to a surprise historical candle.
    
4.  **Blind chart:** launches a fully masked practice session on a random AI-covered symbol.
    

## How does Blind chart remove hindsight bias?

When you pick **Blind chart**, 4CM-AI Charts loads a random AI-covered market on 15m, 30m, 1h, 4h, or D. It masks the symbol (`••••••`), timeframe (`••`), and replay clock (`•••• ••:••`). You judge each [healthy candle breakout](<https://app.forecastcity.com/academy/glossary/glossary#healthy-candle-breakout>) and [trading zone](<https://app.forecastcity.com/academy/glossary/glossary#buy-zone-sell-zone-and-reverse-zone>) purely on price structure rather than memory.

![Replay in Blind chart mode with masked symbol and timeframe, Reveal button, and Step forward.](https://m.forecastcity.com/t/tnt_forecastcity/media/7e/7e81a8be51dec3fc6aaac57c016b024dc28f373e06f3da7338546ddbc56b49ad.png)

Blind chart hides the symbol, timeframe, and date until you click Reveal.

1.  **Masked symbol and timeframe:** keeps the market hidden while you read levels and map your trading plan.
    
2.  **Reveal button:** click **Reveal** when you finish your drill to uncover the real symbol, timeframe, and date.
    
3.  **Step forward:** advance candle by candle to test your entry, stop loss, and [stepped profit targets](<https://app.forecastcity.com/academy/glossary/glossary#stepped-profit-targets-and-free-trade>).
    

You can also launch **Bar Replay** from any logged trade inside **AI Trading Journal**. The chart opens 12 candles before your entry with your entry, stop-loss, and target lines drawn automatically.

**Multi-timeframe practice drill:** open a 2-column layout with 4h on the left and 15m on the right for one symbol. Press `Alt+B` and keep **Sync** on same-symbol mode. As you press `Shift+→` on 15m, the 4h candle updates smoothly without revealing future 4h highs or lows early.

## Related guides

-   [7\. Workspaces and multi-chart layouts](<https://help.forecastcity.com/charts/workspaces-and-multi-chart-layouts>)
    
-   [9\. Measure moves and jump to any date](<https://help.forecastcity.com/charts/measure-tool-and-go-to-date>)