Good forex system for a Swing trader

I just read the pipsology course on forex systems and decided to check out the cowabunga system. I realized that it was used for the H4 and 15 minute time frame. Please, can anyone recommend a good forex trading system that could be used on the daily time frame and useful for a swing trader? I am ready to backtest all options presented.
I am swing trading because I have a day job and I trade forex in the morning before I go to work and in the evening when I return from work. I don’t have the time to be looking often at the charts except for those times.

Take a look at Rayner Teo’s clips on Youtube. He trades long-term and mostly off daily charts. I don’t use any of his specific systems but he uses good general principles which you can adapt.