The 15% Rule.
it is a rule that rarely gets used at this point. What the rule is too void a trade where a stock somebody sells opens down and closes down more then 15% the next trading day on no news. Or if the stock the person buys opens up more then 15% on no news the next trading day.
Why this rule is important. is it stops someone from getting a huge advantage by a bad print on a stock on a closing basis. where I have seen many times a stock have a bid/ask of .80/.81 but have a bad trade where it trades at $0.65 or $1.00 it stops you from taking advantage of that stray quote. Because in reality chances are you could of never brought that stock or at least very much of the stock at that price, or sold the stock at that price. Now due to the $$ Volume rule I added it rarely comes into play, because stocks that have these issues are generally very low liquidity stocks, this rule was more pertinent when in old contests minimum dollar volume was not a requirement. I still have it there just in case but I doubt it would get used in any contest anytime soon at this point. Hope this helps.
News 
Market Data 
Discover 
