RIMM did prove to be profitable on market open but quickly became unstable. However, not before giving me a fast 30c profit.
SINA shaped up well, I entered but my reading of sentiment on the tape told me it was not going down any further so I exited for a scratch trade (tiny loss after commission). Although I have a maximum worst case stop, I rarely let a losing trade get to that loss when I can see from my integrated reading of price, volume, level 2, time and sales indicates the trade has a higher probability of going against me. I do not believe anyone should sit watching themselves lose money by waiting for a stop to be hit when the trade is moving against them. I simply exit before break even if possible.
This approach means that my momentum trades (the vast majority) have a very high success rate and the occasional losing trade is only very small - as in the case of SINA today.
This is a different approach to most people and it has worked very well and consistently for me for the last five years.
Worth considering, imho.
Richard