It is funny, when I had little, I risk great deal to get ahead and thought I had a lot trading stocks, and the account grew, some point I thought I had less and kept working till I could risk much less and still get decent returns, I now risk 1% or less and never more than 3% total value of entire account. I don't have the patience to trade O'Neil's way, way too much reading, am not a value trader too much, but I do have 50 stocks I trade on regular basis, and expands to 150 as I try to keep same percentage in the market whether long/short.
I don't remember if O'Neal ever did shorting?
First thing I think about when making a longer term trade is how to hedge it, it is more important to me on keeping drawdowns low than making profits each day. If I am not losing much money, I don't have to recover much as those who don't hedge, since drawdowns stay low, I now margin. I don't have to make higher percentage than S&P500 Index to do better, cut drawdown by half or more, have less to recover which automatically make more than Index. Took my awhile to study to do it right for me.