I would test this strategy with my favorite ETF, DIA. There's one trading called, "7 Split action trading". i start buying it again when its drop every 3%, 5%, 10%, 20%, 40% and 70%.
I like the term of "iDeveloper" which is combined words between investor and developer. I do work for OXINION with a position investor and developer. So i would like to share my journey in here. I will have to design for my applications for consumers/businesses/developers and will share all of my knowledge in terms of investment.