Everyone, thanks so much for the recommendations.
I looked through all the recommendataions, and apologise that I wasn't clear on what I was looking for.
I actually want a Monte Carlo simulation that I can also experiment with various position sizing strategies to look at the probable outcomes.
The software should be able to chart the probability distribution of profits, losses, max drawdowns, largest sequence of winning trades, largest sequence of losing trades etc.
It can take input on results of past real trades, or use some probability distribution to generate the wins/losses.
Ideally the package includes the standard position sizing methods known, ie. fixed fractional, fixed ratio, etc. and possibly allow you to program your own position sizing algorithm.
I believe system traders would be very familiar with this kind of software? What's the accepted "standard" to use, out there?
Thank you!