Well, there are some examples here: https://fxdreema.com/examples
They also have descriptions, so when you open one of them you will see what is it about. And they are not strategies, they only explain the basic stuff. So you have explanation in text format (the description) + the project itself, which can be easily backtested. You can see that the one at the top is very basic one. When you continue with the other examples, they become more complex.