Open up => Buy

I seem to be stuck on this Buy/Sell ritual that looks at the foreign markets (before local markets open) and the DOW futures, then at the opening price of a stock, then I decide whether to Buy or Sell. Though I'm sure I've done this a jillion times, I did it again this morning. For example, this is what I find: Okay, so I'll now try the following: > If the price opens UP by x%, I'll buy some at the Open and Sell it ** later in the day. > If the price opens DOWN by y%, I'll Sell some at the Open and Buy it back, later in the day. > In both cases ... Note: It's not only that the percentage of times that the movement continues (from the Open) is high, it's the fact that it happens quite often! Here's another (more familiar) guy: P.S. I got me a spreadsheet, but it ain't ready for public consumption ... yet. ** I forgot to mention that I'd never sell more than 50% of my holdings ... just in case I goofed (which is often). When I sell 50% and the stock goes UP, I tell my wife: "I'm happy. I kept 50%" When it goes down, I say: "I'm happy. I sold 50%" P.P.S. Okay, now I got me a real, live spreadsheet here. Soon, I'm thinking of buying Bill Gates' mansion ...