Price Acton Lab looks more interesting for use by discretionary traders as this post shows:
http://www.priceactionlab.com/Blog/2014/07/quantitative-analysis-of-the-double-inside-day-breakout-in-sp-500/I am not sure about developing systems though.
On Tuesday, July 8, 2014 10:42:04 AM UTC+3, FXtrader wrote: