Great sample files. I think there is an error in the Monte Carlo simulation though. If my understanding is correct, time=0:20 is the number of steps in each simulation. As such, we need to adjust the drifts and std's by it. So in the montecarlo.m file,
drifts = mRet.*dt/(tLen-1);
stds = valat.*sqrt(dt/(tLen-1));
Otherwise we are not projecting one-day returns.
I recently came across your webinar on Algorithmic Trading in 2009 and it is a great one. However for the " simple market making system based on a paper by Sanmay Das" part, I am wondering which paper you are refering to and it seems that this system is not about market making but a directional bet system. Finally, would you please provide more resource on the code "callnnpiter" such as relevant papers? I really appreciate it and thank you in advance!