THE SPREAD WILL EAT YOU ALIVE WITH MOST SYSTEMS!
Spark,
Here is the most important and primary reason you will lose. The spread. Any system that is short term and loses will lose the other way too. Heres a revelation for all of you. If 95% of traders lose, than why doesn't the 1 out of 20 who wins make 19-1 on his money every year? The answer is that the house, or brokerage firm is always the biggest winner. They are not giving you free websites and blogs and mt4 platforms and this and that if you think they are living on 1 or 2 or even 4 pips of your money,do you? There are so many little "holes" everybodys money falls into, I make the claim that anyone who trades for 5 or 10 pips at a time must lose in the long run. You cant win 10 pips,give your broker 3 and expect to win, giving away a 30% "chop" as we poker players call it. Impossible.
Now as far as your reverse system method. I too have been trying to find a system so bad that I can make a fortune going opposite the darn thing. Good thinking. Just make sure its based on at least 60m bars, daily is even better and the win or loss is at least an avg of 50-100 pips or more as to make the spread fairly insignificant.
If you really want the best system-open a small brokerage firm and then you can get filled in between the spread. If you are serious about it, PM me. I know a clearinghouse. Otherwise never trade anything that has an avg wiun of less than 20 pips. Its a waste of time. After 15 years I should know...no? -)