Free, unlimited backtesting you can trust
AlgoBars gives every account free, unlimited backtesting. Tests only use data that was known at the time, trades fill on the next bar, and fills and spreads follow each broker's real rules. The same strategy on the same data gives the same result every time. You can test on 10+ years of data, optimize parameters, and import Pine Script, MQL or NinjaScript for free.
Last updated
What makes the results honest
No look-ahead
A value on a bar never uses a later bar.
Next-bar fills
Trades fill on the next bar, the way they would in a live account.
Broker-true costs
Fill delay, worst-fill rules and spreads can match each broker.
Reproducible
The same script, settings and prices give the same result, to the last digit.
Included free
- Unlimited backtests on every account
- 10+ years of backtest data and historical tick replay
- Parameter optimization
- Performance reports and heatmaps
- Strategy templates and versioning
- One-click deploy to live trading
Paid backtesting tools vs AlgoBars
Competitor prices from each company's own pricing page or a cited listing, checked October 2026. Each name links to a full comparison.
| Paid tool | What it costs | AlgoBars |
|---|---|---|
| FX Replay | Free plan with limits; $17.99 to $35 a month | Free |
| Forex Tester | Free version limited to 1 hour; from $30 a month or $199 a year | Free |
| TradingSim | $79 to $89 a month ($396 to $449 a year) | Free |
| Soft4FX Forex Simulator | About $99 to $109 one time (MetaTrader add-on) | Free |
| TrendSpider | From about $54 a month (annual) or $89 a month | Free |
| StrategyQuant X | Ultimate $2,900 one time; walk-forward from the Professional tier | Free |
| TradesViz | Free basic plan; $14.99 to $29.99 a month for paid plans | Free |
| QuantConnect | Live trading needs a paid plan with live nodes; strategies in Python or C# | Free |
Frequently asked questions
Is backtesting really unlimited?
Yes. Backtesting is free and unlimited on every account.
Does the backtester avoid look-ahead bias?
Yes. A value on a bar never uses a later bar, and trades fill on the next bar.
Can I backtest my TradingView strategy?
Yes. Import the Pine Script for free, then backtest it.
What is the best free alternative to FX Replay or Forex Tester?
AlgoBars. Market replay and backtesting are free and unlimited on every account, with walk-forward analysis and Monte Carlo simulation included, where FX Replay costs $17.99 to $35 a month and Forex Tester starts at $30 a month or $199 a year.
Is there a limit on how many backtests I can run?
No. Backtests are free and unlimited on every account.
Related answers
Sources
Competitor prices and limits change. They are shown as published when checked. Trading involves risk of loss.
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