Sometimes the best things are the simplest, believe me. There are tons of people who can talk about backtesting, TA analisys , strategies etc...
One simpe thing : Buy 1 apple at price X and sell for X+Y. once that triggers => rebuy that apple for price X again. So you have a profit of Y.

Repeat this for 10, 100 or 100 different prices of X (x.10, x.20, x.30 etc.....)

My personal opinion!