Pre & Post Market Trading

So for the first time in my short lived trading career, I'm going to have the ability to trade pre & post market. Does anyone have any tips/suggestions/strategies for trading in this time frame?

Thanks,
Tenfly

 

Try nasdaq heat maps for premarket. I sometimes take the opposite trade on the highest gainers (losers) for the quick scoop.

http://screening.nasdaq.com/heatmaps/heatmap_pmi.asp

 

Who provides the best afterhours data (Time & Sales and Level II (ECN books))?

Opinions anyone?

 

Yes. Dont do it.

 

Just remember that error fills on ecn's don't get reversed in pre/post market so double and triple check your prices before sending.

 

Afterhours market are inefficient, and sould not be traded,
unless you know how it works.

As an example, I remeber i wanted to sell 500shares of
QQQ after hours, when i saw 1 million shares bought, but
my 500shares still remaining there, isn't this crazy

 

Everytime I sell before or after hours I find I could have gotten a better price at the open.

 

If only this were true...

 

I agree with easyrider and dustin. On occasion when my profit objective has been met and the spread not too much, I have exited pre or post market. Most of the time I would have been better off being patient and handling during normal hours. The most recent example was buying MCD right after the mad cow news came out. It was well off after hours but was even lower at the open the next day.

 

Can you expand? I've never had to try, but that's what I had always heard.