How to Backtest SyntX Indices Free (2026): Replay Them Candle by Candle

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Key takeaways

SyntX are Weltrade's 24/7 synthetic indices (PainX, GainX and more) on MetaTrader 5
You backtest them with data from your own terminal, and a free demo account is enough
The export takes about a minute, and the file never leaves your computer
Replay mode lets you practise a setup candle by candle before risking a cent
Total setup: about 15 minutes, total cost: $0

Every serious trader eventually asks the same question: does my setup actually work on this market, or do I just remember the wins? On normal markets you can answer that with any backtesting tool. On SyntX indices you couldn't, because no charting platform carries the data. Here's the honest fix: your own MetaTrader 5 terminal already has the data, and you're entitled to use it as a client. This guide shows you how to pull it out and replay it candle by candle, for free.

Step 1: Open a Weltrade account

SyntX indices only exist on Weltrade's MT5 servers, so the data comes from a Weltrade login. A free demo account is enough: the terminal downloads the same price history on demo as on real. Sign up, then in your dashboard create a Demo SyntX account. Weltrade shows you three details: server, login number and password. Screenshot them.

Step 2: Install MetaTrader 5 and log in

Download MT5 for PC from your Weltrade dashboard and log in with the server, login and password from Step 1. If you already trade Deriv on MT5, this is a second login inside the same kind of terminal, they don't interfere.

Step 3: Load the SyntX symbols

Open Market Watch, click the + search and add the SyntX symbols you care about (PainX, GainX and the MAX variants). Open a chart for each and scroll it back a few times: that forces the terminal to download deeper history, which becomes your backtesting data.

Step 4: Export the bars

In MT5 go to View → Symbols, select your SyntX symbol, open the Bars tab, set the timeframe and date range, click Request, then Export Bars. MT5 saves a small .csv file to your computer. That one minute of clicking is the entire "data pipeline".

Step 5: Drop the file into the backtester

Open the AAFX Backtest chart, click My data, and drag the .csv in. The file is read inside your browser and stored only in that browser. It is never uploaded, the chart's servers never see your data, there is no upload step at all.

Step 6: Rewind and practise

Hit Replay, click anywhere on the chart to pick your starting point, and the future disappears. Step forward candle by candle, play at up to 25 candles a second, and practise your entries as if it were live. Then run Test this setup to see how your rule performed across the whole history, in-sample and out-of-sample, so one lucky week can't fool you.

Open the backtester, free plan and 7-day Pro trial, no card →

Trading Deriv synthetics instead?

Even easier: Volatility 75, Volatility 100, Boom and Crash stream into the chart live, with no export and no setup. Open the chart and you're replaying in seconds. If you don't have a Deriv account yet, open a free demo here, then come back and practise properly before risking anything.

Common problems

Export file is empty or short, the terminal hasn't downloaded the history yet. Open the chart, scroll back several screens, then request the bars again. Raising Max bars in chart settings helps too.
File rejected by the chart, it needs the bars export with date, time, open, high, low and close columns, which is exactly what Export Bars produces. A trade report or tick export won't work.
Can't find SyntX symbols, you're logged into the wrong server. SyntX only exists on Weltrade's MT5 servers, so check the server name from Step 1.

Frequently asked questions

What are SyntX indices?

SyntX is Weltrade's family of synthetic indices, markets like PainX and GainX that trade 24/7 on MetaTrader 5. Like Deriv's Volatility and Boom/Crash indices, they are algorithm-generated markets with no news events or market hours.

Is backtesting SyntX really free?

Yes. A Weltrade demo account is free, MetaTrader 5 is free, and the AAFX Backtest chart has a free plan plus a 7-day Pro trial with no card required. The data comes from your own terminal, so there is no data feed to pay for.

Do I need to deposit money at Weltrade first?

No. A demo SyntX account is enough. Your MT5 terminal downloads the same price history on demo as on a real account, and that history is what you export and replay.

Is my exported data uploaded anywhere?

No. The file is read inside your browser and stored only in that browser. The chart's servers never receive or store your price data, there is no upload step at all.

Can I backtest Deriv synthetics the same way?

Deriv synthetics are even easier: Volatility 75, Volatility 100, Boom and Crash stream into the chart live with no setup and no export, so you can start replaying them in seconds.

How much history can I replay?

Whatever your terminal holds, which is typically months to years of M15 candles. Before exporting, scroll the chart back or raise the Max bars setting in MT5 options so the terminal downloads more history.

Written by Tony: AA Global FX
Tony runs a live trading desk on Deriv synthetic indices and index CFDs and has published 116+ free trading tutorials on YouTube since 2022. About · YouTube
Last updated: 2026-09-08

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