BacktestJS

How much does it cost?

BacktestJS is completely free, not freemium, no signups, no credit cards and no ads. Not only is the application free but its open source as well so users can contribute to the application!

How Can I Contribute To The Project?

Great question! There are a lot of moving parts keeping this project alive. One great way is to contribute to the code of the BacktestJS application itself or adding indicators / strategies.

Why is everything in Typescript when the name is BacktestJS?

Now this is a great question 🙂 . In general its always a better practice to code in TS over JS in my honest opinion.

Why did you make this and who are you?

My name is Andrew and i made this monstrosity of an application, website, documentation and youtube videos.The why is a bit harder to explain. A friend once asked me to write a backtest of a strategy he had. I didn’t know what a strategy was, not even what a candle was. But like a good, curious friend i figured out this stock world, how to get candle data and then wrote some rudimentary tests.

How to code a strategy in JS instead of TS?

While i personally don’t recommend the approach it can easily be done. Run the command “npm run makejs” or “npm build” and then the typescript will be converted to javascript in a new folder called “dist”. To code a strategy you must go inside “/dist/strategies” and you can code your strategy inside here with javascript instead of “/src/strategies” which is the place to code strategies using typescript.