A free TradingSim alternative for market replay

The short answer

TradingSim's plans cost $79 or $89 a month, or $396 to $449 a year. AlgoBars gives you market replay, unlimited backtesting and paper trading free on every account. When you are ready, you can trade the same strategy live on 334 brokers, which a simulator alone does not do.

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Last updated October 10, 2026

TradingSim vs AlgoBars

TradingSim figures from its own pricing pages or cited listings, checked October 2026.

	TradingSim	AlgoBars (free)
Price	Pro $79 a month ($396 a year); Premium $89 a month ($449 a year)	Free
Markets	Stocks, futures and crypto	Forex, indices, metals, energy and crypto across 1,000+ markets
Practice	Market replay simulator	Market replay and paper trading, free
Going live	Simulator only	Trade live on 334 brokers

Everything you would pay for, free on AlgoBars

Here is what a backtesting and market replay trader gets on AlgoBars at $0, compared with paying for TradingSim.

What you get	On AlgoBars
No coding required	Build in plain words or no-code blocks, or write AlgoBarsX (ABX), AlgoBars' own trading language
Backtesting	Free and unlimited, on every account
Chart types	Kagi, Point and Figure, Line Break, Renko, range bars, tick charts and Heikin-Ashi, free
1-second charts	1s, 5s, 10s, 15s and 30s timeframes, free
Market replay	Free
Walk-forward analysis	Free
Monte Carlo simulation	Free
Strategy optimizer	Free
Paper trading	Free
Trade journal	Free, built into the platform you trade on
Indicators	100+ built in and unlimited custom indicators, with no per-chart cap
Multi-chart layouts	Free
Live trading	Free on 334 integrated brokers and 131 prop firms
AI that writes a strategy for you	Uses credits: 250 free every month, then $1 per 100

What actually costs money on AlgoBars

Every platform feature is free on every account, every month: no card, no trial and nothing to cancel. You only pay for AI usage: AI writing a strategy, indicator or alert for you, AI analysis and chat, and auto-trading on external (non-integrated) brokers. You get 250 credits free every month, and more cost $1 per 100. Anything you write yourself, every backtest, every import and trading on integrated brokers stay free.

Step by step: move from TradingSim to AlgoBars

Create a free AlgoBars account. No card is needed, and there is no trial clock.
Pick a market and open a chart. Practise with market replay, or write your rules and backtest them as often as you like.
Test it: backtests are free and unlimited. Check robustness with walk-forward analysis and Monte Carlo simulation, also free.
Go live on one of 334 integrated brokers. Strategies keep running on AlgoBars servers when you log off.

When TradingSim may still suit you

TradingSim suits US stock day traders who want Level 2 and time-and-sales replay of US equities.

Backtests you can trust

AlgoBars backtests use only the data available at each moment and fill orders on the next bar, so a result reflects your rules, not hindsight. They show the raw price move, before spread and commission, so you see the edge of the rules themselves. Check each broker's spread with the broker spread map before going live.

Frequently asked questions

Is there a free TradingSim alternative?

Yes. AlgoBars gives you the same core job free: market replay, unlimited backtesting and a trade journal, on every account.

What does TradingSim cost compared with AlgoBars?

TradingSim: $79 to $89 a month ($396 to $449 a year), as published when checked. AlgoBars: $0 for every platform feature, on every account.

Is AlgoBars really free?

Yes. Every platform feature is free on every account, with no card and no trial clock. Only AI usage costs credits, and you get 250 free every month.

Does AlgoBars charge for backtesting?

No. Backtests are free and unlimited on every account, on any market and timeframe AlgoBars has data for. Walk-forward analysis and Monte Carlo simulation are free too.

When is TradingSim still a good choice?