I'm a deeply committed Christian and a trader.
Someone earlier said truly devout Christians wouldn't trade (maybe a crude joke,) but that simply isn't true. We have money that would otherwise be in the bank that we'd like to put to work just like any other trader/investor. I recall the parable of the 'good steward' that Jesus told--and although the point of the story wasn't trading of course--the one praised was the man who earned income off his money instead of the man who hid it until his master came back to receive it.
Does religion help your trading? If I may be so bold, I really think it does, or atleast can. First, there is less pressure and thus emotional interference in trading (and all other things in life) when I remember that I'm just trying to do my best, that money ultimately doesn't matter, and that whatever is in God's will (whether I should become the next Larry Williams or lose my entire stake next year) will happen. Second, the demand for humility help keep your from becoming too proud (downdraws do an excellent job too

). I may be among the few Christians who feel this way, but I don't believe that just because I've been blessed with the ability to reap good money that I deserve to spend it carelessly on my various whims; I live frugally and don't have dreams of material grandeur (well... I wont act on them anyways

) which help me to not materialize gains or losses to some extent.
I should say that I don't pray for a trade to keep the trend, or pray to avoid being stopped out. Infact, I think its wrong in certain circumstances (atleast if they should know better.) You're opening yourself up to risk, and God isn't a magic genie. Imagine if God led us through the markets completely successful: we'd be proud and dependent to the point of not maturing. Christian or not, everyone needs to be kicked around now and again to stay humble, and if everything came to us for free I don't think we'd truly appreciate the gifts that we all (Christian and otherwise) are given. Hard work and integrity seem to feed off each other: not much came easy for Jesus or St. Paul. I've been more pampered than they, but I'm greatful for the odd kick in the butt to help keep me honest.