Arca doesnt want anyone taking responsibility for their actions if they find that they make a bad trade pre-market and cry about it..I had 1 busted last week on an oil servive company and everyone knows how volatile they are premarket depending on price of oil..This morning had 1 busted on MHP after a very positive article in Barons yesterday said the company is worth more than $63 a share if broken up..Trade this morning was 54.94...This is insane. If you put a limit order in and get the trade filled , apparently you wanted it..Arca shouldnt be busting trades when you make a trade at 8.02 in the morning because you figured you would get in early before the stock runs..After you find out you were wrong, why in the world should you be rewarded..I can understand an honest mistake, but if you trade on a barrons article or the price of oil , dont cry about it if you are wrong and ARCA shouldnt be screwing someone who puts in a limit order and it gets filled.......