Replay realism
How realistic is market replay for learning to trade?
Replay gets the chart exactly right and the fills only approximately right. Knowing the difference is what makes replay practice useful.
Short answer: realistic for reading price and practising decisions, less realistic for execution. You see the real historical bars with the future hidden, but simulated fills ignore queue position and slippage, and there is no real money at stake. Replay results do not predict live profitability.
What replay reproduces faithfully
The real price path
Every bar is historical 1-minute data for that session, so the moves, gaps and chop really happened.
Uncertainty
Later bars stay hidden, so you decide without knowing the outcome.
Session timing
The open, lunch and afternoon unfold in order, so you practise the rhythm of the day.
Realistic vs not realistic
| Feature | NQ Replay | Live trading |
|---|---|---|
| Price bars | Real historical | Real |
| Queue position on limit orders | No | Yes |
| Slippage on market and stop orders | No | Yes |
| Money at risk | No | Yes |
| Repeatable sessions | Yes | No |
NQ Replay's fills are idealised on purpose: they show whether an idea works before execution costs.
How to make replay closer to live
Risk rules
Same contract size and stop distance every trade. Stop for the day after a set loss.
Challenge mode
Practise against a profit target and loss limits like a funded evaluation.
Journal everything
Every fill is logged with its R multiple so you judge the sample, not a lucky day.
What replay cannot reproduce
Queue and fills
In a live market, a limit order waits in a queue and price can touch it without filling you. Replay can't know where you would have been in line.
Slippage
Fast moves can fill market and stop orders worse than expected live. Replay doesn't model that.
Emotional pressure
Simulated money doesn't hurt. Hesitation and revenge trading show up more when it's real.
News timing
You still see the bars from news releases, but not the headline itself as it happened. Knowing the calendar ahead of time also changes how you prepare.
How NQ Replay handles fills
- Market orders fill at the close of the current bar.
- Limit and stop orders fill at your price once a later bar trades through it; they never fill on the bar where you placed them.
- Stops and targets close the position when a bar reaches their level, priced with real contract values (NQ $20/point, MNQ $2/point).
- No slippage, commission or queue model is applied, so live results may be worse.
Add real consequences: a profit target and loss limits.
Try challenge modeTrack every trade in the journal, and see market replay vs paper trading for when to move to real-time practice.
Frequently asked questions
Is market replay realistic?
The price path is real: you see the same bars that printed that day, with the future hidden. What it cannot reproduce is your order's effect on the market, queue position, slippage and the pressure of real money.
How does NQ Replay fill simulated orders?
Market orders fill at the current bar's close. Limit and stop orders fill at your order price once a later bar trades through it. There is no simulated slippage or queue position, so fills are an idealised version of live trading.
Will replay results match my live results?
Not necessarily. Replay can show whether a setup has an edge and whether you follow your rules, but live results also depend on fills, costs and emotion. Treat replay results as a starting point, not a forecast.
How can I make replay feel more like live trading?
Use fixed risk per trade, stop after a daily loss, trade at normal speed around the open, avoid peeking at later bars, and journal every trade. The challenge mode adds a profit target and loss limits.
Is replay better than paper trading?
They train different things. Replay gives many sessions quickly; paper trading gives real-time pressure. Many traders use both.
Related
Practise with the real price path
Free plan, NQ and MNQ, no install. Replay a session and journal every decision.