If this is you
Choose TradeZella
You want one journal for every trade, backtested or live, with imports from 500+ brokers. Or your strategy can be written as rules and tested automatically.
TradeZella vs FX Replay
TradeZella vs FX Replay: journal first or replay first
TradeZella and FX Replay both replay history in the browser, down to seconds, across several markets. TradeZella is journal first: 500+ broker imports, automated tests from plain English, and backtests filed beside live trades. FX Replay is replay first: a prop firm simulator with costs, Monte Carlo and Mentor AI. BacktestFlow goes deep on forex, with backtest and journal kept apart.
3rows TradeZella leads
2rows FX Replay leads
4rows BacktestFlow leads both
The difference that decides it
Where should a backtested trade live?
Both tools let you step through history and trade it by hand. The split is what happens to the trade afterwards.
TradeZella is a journal first. Its backtesting page says “Backtests land in the same journal as your live trades”, and you tag them there. It adds two more ways in: guided scenarios that prefill the symbol and dates, and automated tests from a strategy you “describe it in plain English”.
FX Replay is a replay platform first, built for manual traders who want to practice execution. FXR Journal keeps an automatic log of each trade, and compares the plan with what actually happened across sessions.
BacktestFlow takes a third line: one statistics engine, two lenses kept apart. The backtest asks where your edge is; the live journal asks whether you can execute it. Our TradeZella alternative and FX Replay alternative pages go row by row.
Side by side
Feature by feature. Where one tool leads, its cell is marked: 3 rows for TradeZella, 2 for FX Replay, 4 for BacktestFlow. BacktestFlow is the last column, for reference.
| Feature | TradeZella | FX Replay | BacktestFlow |
|---|---|---|---|
| What it is | A trading journal with backtesting built in | A browser based backtesting platform with a journal | A replay backtester for forex, with a separate journal for live trades |
| Backtesting modes | LeadsThree: guided scenarios, manual replay “candle by candle with a full order panel”, and automated runs from rules written in plain English | Manual replay with “Bar-by-bar control” on real historical data | Manual replay, candle by candle, where you place every trade yourself |
| Trade record | Backtests land in the journal next to live trades, ready to tag; a required write up before the replay continues is not documented | An automatic trade log: “trades, charts, and statistics without manual entry” | LeadsEvery close opens a write up with notes, tags, checklist and screenshots, and the replay waits until it is saved |
| Backtest and live trades | In one journal | FXR Journal compares “the plan with what actually happened across sessions” | Kept apart on purpose, on one statistics engine: one lens measures the strategy, the other your execution |
| Broker import | LeadsAuto journaling “synced with 500+ brokers” | Not documented | Entered by hand in the live journal, which keeps its own statistics and Flow Coach reports |
| Analytics | Leads“50+ analytics reports”, Sharpe, Sortino and Calmar ratios included | Statistics captured with every trade, setup analysis, pattern detection and Monte Carlo | On paid plans, more than 40 metrics in five sections, in R, %, money or pips; on the free plan, the Verdict and Edge sections |
| Findings and coaching | Analysis that names Smart Money concepts (SMT divergence, CHoCH, FVG, OTE and more), with an “Edge verdict” | Mentor AI reviews “patterns across the full trade history” | LeadsFlow Coach runs 28 analyses. A finding is kept only if it passes a significance check, and a report may only quote numbers the engine measured. On the Max plan every report, on the others the first per strategy and lens |
| Execution metrics | Not documented on its backtesting page | Plan against outcome review in FXR Journal; named execution metrics are not documented | LeadsPlanned against captured R:R, target hit rate and position sizing consistency on every plan; the checklist discipline score on paid plans |
| Forex specific analysis | Forex is one of five asset classes | Forex is one of 6 markets | LeadsStatistics in pips, candles on the DST aware 17:00 New York session grid, and on paid plans, performance by trading session |
| Markets | Futures, stocks, forex, crypto and options (“5 asset classes”) | “120+ assets across 6 markets”: futures, forex, indices, metals, energy, stocks and crypto | 41 instruments on paid plans, forex first: 28 pairs plus metals, energy, the dollar index, four stock indices, BTC and ETH. The free plan has 8 of them |
| Data below one minute | Replays price “down to the second” | A seconds timeframe; its FAQ lists candles from 5 seconds up to monthly | None: one minute is the smallest |
| History | “11+ years of data”, since September 2014 | LeadsIts FAQ: back to 2003 for major forex pairs | Forex from 2010 to 2015 depending on pair: GBPUSD and AUDUSD from 2010, EURUSD from 2012. Gold from 2011 |
| Several charts at once | “Up to 8 synced charts” | Multi chart layouts: assets and timeframes side by side in one session | One instrument per session |
| Indicators | Built in ICT studies: FVG, Asian Range, HTF Bias, Key Levels and Power of 3 | LeadsFXR Script, its own scripting language, with an editor built into the platform | TradingView Charting Library indicators and drawings, plus built in Session and TDI studies. On the Max plan, a developer rebuilds your Pine Script® indicators by hand |
| Prop firms | Prop Firm Sync: one dashboard to track every live prop firm account | Prop Firm Simulator: “Set targets, drawdown limits, spreads, and commissions” | On paid plans, a challenge mode: profit target, daily and max drawdown on equity, open positions included, and a locked Passed or Failed result |
The short answer
Which should you use?
If this is you
Choose FX Replay
You trade by hand across several markets and want seconds data, a prop firm simulator with costs, Monte Carlo and Mentor AI in one browser tab.
If this is you
The forex specialist: BacktestFlow
You trade forex by hand and want the backtest and the live record read separately: where the edge is, and whether you execute it. Every trade is recorded before the replay moves on.
FAQ
Frequently asked questions. About TradeZella, FX Replay, and the differences.
It depends on where you want the trades to end up. TradeZella files backtests in the same journal as live trades and adds automated tests from plain English. FX Replay is built for manual replay practice, with a prop firm simulator that models spreads and commissions, plus Monte Carlo. For forex traded by hand, BacktestFlow measures execution as statistics.
Yes. You describe a strategy in plain English, Zella AI parses it into rules, and the test runs across its history. The page marks automation as beta. BacktestFlow is manual by design: your plain words become a checklist you trade against by hand, and every trade is measured against it.
Yes: FXR Journal. An automatic trade log captures trades, charts and statistics without manual entry, with tags and filters on top. It compares the plan with what actually happened across sessions. TradeZella goes further on live trades, with auto journaling from 500+ brokers.
They do different jobs. FX Replay's Prop Firm Simulator rehearses a challenge on history, with targets, drawdown limits, spreads and commissions. TradeZella's Prop Firm Sync tracks the live funded accounts you already have. BacktestFlow's challenge mode, on paid plans, is a simulation on historical candles. BacktestFlow is not affiliated with any prop firm.
FX Replay goes further back on forex: its FAQ dates major pairs to 2003. TradeZella lists 11+ years, since September 2014. Both replay below one minute. BacktestFlow replays one minute candles, with forex from 2010 to 2015 depending on pair. For strategies on 15 minute charts and above, one minute candles are usually enough.
Both go wide across markets. BacktestFlow goes deep on forex, and keeps backtest and live journal as two lenses on one engine. The replay waits until every trade is recorded. Flow Coach keeps a finding only if it passes a significance check, and every plan measures planned against captured R:R and sizing consistency.
Sources
Check it yourself. Every claim about TradeZella and FX Replay on this page was checked against their own published material in November 2026.
We quote no prices: they change often, so check them at the source. Software changes too, so if something here is out of date, it is an error rather than a position, and it gets corrected.
BacktestFlow is not affiliated with, endorsed by, or sponsored by TradeZella or FX Replay. TradeZella and FX Replay are trademarks of their respective owners. Features change: verify current details at the source.