I have been thinking about how to find a stock that trades predictably upwards with consistent valleys and troughs every few days/every week. If there were a statistics program that I could use to find the most predictable one, I could trade just this one stock, and on average try to sell after it gains 1.5% for example (it's average gain each time), then waiting for it to go down by it's statistically normal amount then buy again.
I'm sure I'm talking about something that everyone knows about does... what is the best way to approach this technique, what are opinions on this.