Quote from mizhael:
I tend to use TradeStation etc. to start,
and then use Matlab to really do the work so that I understand every detail...
For MatLab, check out Wilmott forum:
http://www.wilmott.com/index.cfm
As you can see, topics are very different from the TradeStation forum. You are more likely to see discussion of jump diffusion, volatility models, PCA/ICA, etc. Versus TradeStation discussions of moving averages, pivot points, etc.
If you purchased Tradestation:
https://www.tradestation.com/Discussions/Main.aspx