Hi,

I would like to backtest my strategies on all stocks on the S&P 500, chronogically and by updating the account size. It is not possible with the strategy analyzer, do you know where I could find a piece of code that could help me to do this?

Thank you in advance for your help

In terms of backtesting (and forward testing as well), Amibroker is certainly an option to consider.
Its speed and incredible flexibility and functionality make it an outstanding choice for those traders who are willing to put in the time to learn it properly.
However, its greatest strength - flexibility - is also its greatest weakness as well, because it does require much more of a learning curve than other trading platforms.