Ok, it's my first post here I'd like say'hi' to everybody and thank creators of this forum to get their hard work.
Now, when it comes to sharing I must disagree with Merlin. You state that exits might be problem because more people will be closing the exact same place, but you seem to forgetting exactly what happens between entries and exits: there are other people (and egies) trading which mostly HAVE to decide on your leadership. If you went and moved the market upward, someone got margin call, someone else got SL hit, bunch of others got long signal with their egies and some got signal to close short position. All of them moved market in your direction just a bit. This'little bit' caused some more new longs, margin calls and SLs hit. So yes, when a lot of individuals trade the same egies, you might get slippage when launching or closure but between market will move just a little bit longer than it would without you. The reason that people don't share is greed or maybe fear that their hard work will go to waste. It's not discrection (mostly) as someone said that expert advisors don't work. Ed Seykota proved they are currently working, Michael Coven in his'Trend following' proved they are used by the big and exact same institutions.
All the best,
Lucky