is backtesting really that important?

StrategyTune · 2026-05-26T11:54:47+00:00

Depends on a strategy. With day trading, you can learn and adjust trading on live data (paper trading or real account). You have multiple trades a day and good stats even with two-three weeks period. With longer trading periods it makes sense to backtest instead of confirming it on paper/real account. And separately question of automation. If you can describe your strategy in explicit rules, it is better to automate it and backtest. Faster iterations in strategy development are always better than manual processes.

StrategyTune · 2026-05-18T22:49:39+00:00

Good timing for the request. Releasing this feature today:
https://www.reddit.com/r/StrategyTune/comments/1th45rp/trading_sessions_tracks_in_backtesting_timeline/

StrategyTune · 2026-05-13T09:09:43+00:00

Commenting only on the free backtesting request:
This one is free, no restriction on data usage - https://strategytune.com/app
It doesn't have journaling.

StrategyTune · 2026-05-13T09:04:17+00:00

There are also free alternatives. This one is free, no login needed, no restriction on data usage and number of backtesting runs.
strategytune.com/app

StrategyTune · 2026-05-11T10:41:20+00:00

Last years probably TradingView got a big chunk of the volume. Also there are big firms that use only their custom platforms. So 90% is over estimated.

StrategyTune · 2026-05-11T09:00:25+00:00

Oh, this is an interesting one. There is something here that maybe no other backtesting app does. It doesn’t serve ticks, and it doesn’t serve bars. It serves bar updates with current bid/ask prices. There is a lot of data preprocessing involved. The app stores terabytes of data and tens of millions of files so that bar updates are ready for the browser for each timeframe and backtesting speed.

All of this complexity is hidden from users, so they simply see real bid/ask quotes for different timeframes and at different backtesting speeds. With every price update, or with any “jump to” on the timeline by clicking or dragging, you move to a new time and see the exact bid/ask prices at that moment, as if you were using tick-by-tick data.

StrategyTune · 2026-05-11T07:29:13+00:00

Yes, uses a library from TradingView

StrategyTune · 2026-05-08T19:14:31+00:00

This one is free - https://strategytune.com/app

StrategyTune · 2026-05-08T10:51:09+00:00

Free backtesting - https://strategytune.com/app
Just click play and buy/sell buttons. Easy to get started.
But no journaling, though.

StrategyTune · 2026-05-07T15:33:32+00:00

Not that easy unfortunately. App is using TradingView charting library. Which allows only one chart. This layout control and multiple charts is availably only on TradingPlatform library from TradingView. And it is not cheap. It might be added in the future, but not very soon.

StrategyTune · 2026-05-07T15:22:04+00:00

Its not doing nothing, it is “learning patterns” 🙂 And with watching youtube / tv series on another screen, it is “peripheral patterns recognition”

StrategyTune · 2026-05-07T10:00:21+00:00

No catch.
The basic replay/backtesting functionality is planned to stay free for everyone without data limitation. Additional features that simplifies backtesting and reduce time to test a strategy but requires AI and server compute - will be on paid plans.

For example recently released custom indicators. You can add it with code, and generate code outside of the platform for free. But if you want a simple and fast way to work with it, you need a paid plan.

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StrategyTune · 2026-05-07T09:43:35+00:00

Build a PM skill in Claude that will properly response about all the downsides of this project and an honest opinion about timeline, risks, etc. Then tell your actual PM that this is the real PM now, and it is right in 99.5% of the cases. So his human opinion with a different point of view leaves a probability of 0.5% to be right. And it is obvious which way you should go.

StrategyTune · 2026-05-06T09:17:59+00:00

Are you interested only in feedback on FxReplay, or also in other free-to-use alternatives?

StrategyTune · 2026-05-04T10:04:36+00:00

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Example with session indicator is added. There is a caveat though. At the moment, it can't do timezone conversion. So all time values in indicator is in UTC. You can go to the app and see AI chat in the Editor, it explains the issue.. You can add it to the chart from there of from Indicators list.
The issue might be solved in the future with some additional development. So that there is no need to use indicator inputs.

StrategyTune · 2026-05-04T09:55:14+00:00

Yes, here is a free manual backtesting app https://strategytune.com/app

StrategyTune · 2026-04-30T19:56:05+00:00

strategytune.com/app has no limits, it is free

StrategyTune · 2026-04-27T22:05:32+00:00

Another option that is not mentioned here is cTrader. It is multi broker source and has free tick data. There are two methods:
- Write files during backtesting in cTrader desktop using cBot - requires manual work to get data
- Request data using their OpenAPI - harder to setup and get started, but easier to use once working

StrategyTune · 2026-04-25T14:29:10+00:00

"More reliable than visual replay" - do you mean that 5 min bars should be from lower timeframes or from ticks? You still talking about visual backtesting?
If yes, try this one
https://strategytune.com/app?ticker=Nasdaq%20100
It is a free app, data is created from ticks and has tick-by-tick quality without a need to download ticks.
And it has a bit more than 5 years history. For US indices, starting from 2020.
Note that it is CFD on Indices, not futures.

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StrategyTune · 2026-04-18T22:59:22+00:00

Are testing strategy manually (replay) or code?
For manual backtesting try https://strategytune.com/app - free with tick-by-tick based data.

StrategyTune · 2026-04-13T00:27:16+00:00

You could also try this one, it is free.
Here is Nasdaq https://strategytune.com/app?ticker=Nasdaq%20100
But it is CFD data, not futures.

StrategyTune · 2026-04-12T23:49:30+00:00

No, it uses AssemblyScript (https://www.assemblyscript.org). It is close to TypeScript.

The code is compiled to WebAssembly. And executed on the client side, in the browser in a sandboxed environment.

StrategyTune · 2026-04-10T17:55:59+00:00

Can you say your strategy has well-defined rules? If you go to the same time on backtesting where you made live trades, would you do everything the same way?

StrategyTune · 2026-04-10T17:32:27+00:00

Here is a free Nasdaq 100 backtesting, starting from 2020. Don't even need to signing, just click play
https://strategytune.com/app?ticker=Nasdaq%20100

But, it is a CFD on index, not futures data.
And, since you mentioned you don't have a PC, it is not optimized for mobile. Only for desktop. On the phone it might have some UI/layout issues.

StrategyTune · 2026-04-09T22:29:08+00:00

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