It only lets you backtest 4 months of data at once unless you pay for the premium membership. Anyways,4 months still could be useful for a short term system. Just for kicks, I backtested the bottom feeders system, without the advanced buy and sell criteria and the result was 8% YTD. This would be improved if the advanced sell and sell criteria was used, but still figuring out how to do that. I would pay the extra $5 a month for the 2 years of backtesting in the premium membership, but I'm more interested in forward testing the system versus backtesting at this point. I already manually backtested and it was shown to be very successful. Anything else I could learn from backtesting is just splitting hairs on finding small errors at this point.