Hi Victor,
It's not a matter of intentionally violating the Clearing House rules, let's use this example, your starting day trade buying power is $100,000
He make's a gain of $500 and soon he's trading with $102,000 but the Clearing House is not saying he's "over traded by $2,000" $2000/4 or $500.00 Throughout the day the shifts in account equity are pretty wild, the Clearing House is the problem, it's not the clients job if their looking at their Buying Power online only to get a False DT BP number.
Whose fault would that be? I know of Clearing Houses that don't give you Fed Calls for selling your position you sold overnight and day trading that BP, they don't even though we both know the rules on that, that's a easy call, it's a Fed Call.
The best scenario I see is for him to leave that Brokerage, I've said over and over here on Elite that "Cheap Brokerages often charge you more than regular Brokers, the lack of price improvement, inability to seek out "dark pool" orders offering better prices does not help build a case for any active trader to use a firm that only routes to KCG.