BBB, when I give a review of something it is straight-forward and MY experience with it. I won't try to guarantee anybody else's success and have nothing to gain. That being said, I no longer use TrendLine Trader. In the long run did it hurt my trading . . . No. However, it is no "holy grail" either. When I first used it I was getting reliable signals early in a trend. I tweaked settings to give even me better results, but I will admit in this heavy volatility I was getting entry signals far too late into a run and was not satisfied. The best indicator in their arsenal is still the probability oscillator. So quite simply I did not feel it was living up to expectations. I now use another indicator system. Good Luck to all in your trading.
There are several reviews for Decisionbar Trader by people who have used it. One in particular gives both the pros and cons. Type into Google "Review Of Decision Bar Trading" (without quotes). It should come up as the first result. Hope this helps.