Charting Software

Oct 7, 2007
I like to do some backtesting in order to develop a trading system for myself. Sierra chart and QChart looks interesting but their subscription based pricing not attractive for me as I only want to use it for backtesting at this stage (for about 2 months or so).

Can anybody suggest any other alternatives with time play option?

What about Open Source alternatives? Does anyone using them? Are there any usable ones?