I am going to selll 20% of my shares when the price hits 1.5x my overall average.  Then if it drops, say 30% from that sell point, I buy back the exact number of shares I sold, and leave the extra cash in the account. 

If it continues to rise past a few days of the sell, I will still buy back , but fewer shares than I sold.

That is the risk you have to take.  With Silverado's history, especially the shorting, there is a much higher chance that a 50% increase above my average will in fact be followed by a decrease.