100 shares should be the maximum allocation in your portfolio on a $100,000 of capital. Once price exceeds $150, trailing stop should rise to $135 minimum. I do not actually use stops when trading equities (only in FX). If price closes below my acceptable point of risk I exit my position before market closes.
Update 4/16: Closed all at 154. It smells funny.
Update Stock Split. May 21
Update 4/16: Closed all at 154. It smells funny.
Update Stock Split. May 21