Fxreplay is a cheap backtesting software since the data quality is poor and it does not use tick-accuracy data. Hence, all the tests performed with this tool are very likely to be wrong and miscalculated. On the good sides, they offer good statistics and proper tradingview web interface. However, the charts are very slow and we can have the feeling to lose time backtesting with Fxreplay. The pricing is decent but not as interesting as Naked-Markets one.
Features
Market simulator
Statistics
Historical data
Easy order creation
Market simulator
Speed. Fxreplay interface and replay feature are slow. If you backtest more than 1 hour, the charts become hard to use.
Performance. The performance is another problem, using the maximum speed for replay mode makes the charts choke regularly.
Accuracy. The orders are not processed on a tick by tick basis. The backtests are useless if you trade under 4 hours charts timeframes since there is no real historical spread. Hence, the orders prices are miscalculated.
Historical data
Choice. Fxreplay has only 81 assets available. This is very poor choice. Few stocks, few indices, few cryptos. That's a bad point for Fxreplay.
Historical spread and tick-accuracy. No tick accuracy and no historical spread in Fxreplay. Your backtests are useless if you can't use real spread to assess your strategy against extreme and historical markets conditions.
Timeframe in seconds. They offer timeframe in seconds for most expensive subscription but only for several assets, forex only apparently.
Statistics
Lots of statistics. That's a good point for Fxreplay, they have different stats, overall stats, detailed stats, timing stats, and monte-carlo simulation.
Possibility to import/export from external trading accounts. A good thing to know is that it's possible to import your statement in order to analyze your trades.
Interface
Only web interface. You can only trade online with the web Tradingview version. They do not provide a way to backtest offline.
Presentation. The interfaces are polished, easy to understand and properly designed since it's based on Tradingview.
Pricing
You can trade for free but with strong limitations. The free tier allows traders to use only 1 indicator, 1 week data retention, 2 sessions and only few assets.
Montly/yearly subscriptions. Contrary to forextester, here you can have monthly subscriptions. But Naked-markets is still the best choice here, since Fxreplay is significantly more expensive.