Here is an idea.
I saw on one board Elite I think it was,where Yogi goes.
What they did was that each trade had a ficticious $10,000 on it.
You simply have the whole $10k on each pick each month and your bank increases or decreases.You remain at zero until you have a bank---if you keep losing it you remain often at zero.
Obviously those with the highest bank were the most successful.
The accumulated total was seen under their Avatar.
EG Tech Bank $.05c---Yogi---$1,000,000
The only thing I would like to see though is that you can pick whatever stock you like even if someone has it. Its the cumulative total thats most important.
With 100 entrants your field (For selection) is cut back with so many selections already held by others.---in fact with 200 or more would be pretty un workable.