I'd wait for the good trades too.
This week FNMA:
I bought the 1.65s and 1.73s on Monday - sold the 1.95 avg Wednesday (short term uptrend play)
I played 1.70 - 1.75 in the morning today. That's just momentum on a mini bounce - not an uptrend play.
I know I can buy better tomorrow (more of a 'sure trade' at least, either way she goes) and sell the pop next week for a larger % gain. Hate to keep watching when it sits still, not knowing which way it will go, not worth the time and the stress that way in my opinion.
EDIT: I trade, don't invest. Hence this way.