I guess we need to define predictable. If predictable is that the SPY wont go to 0 or 1,000 by year end then it is predictable. I do predict a trading range (based on placing probabilities in my favor) as I sell premium but there is no way to know (In my opinion) for sure that when I enter a position which way the underlying is going just that it will hopefully stay within a predicted range. When it does stay within a statistically predicted range I profit when it does not I lose. As long as I win more than I lose its profitable which is the case.
