Don't be thick.
If a trader has to operate under someone elses (proven successful for the someone) parameters rather than his/her own (proven successful for the trader) parameters, then it's a bs bar for determining success of the particular trader, plan, system, methods, and techniques.
As for your fixation with time, idk what to say... You mention intraday. All I know is intraday. There is no time element other than eod... LOSING trades don't stretch beyond a money or structural stop. And of course there is nothing that prevents exiting a losing position before a stop is triggered. In all cases, on all trading days, trading positions are flattened a few minutes prior to the end of the rth trading session, profit or loss. End of story.
Regarding account size, I trade with a fixed account size that includes cushion (I am NEVER 100% in). I have already dispelled the time factor. And for bias, I trade long and short, I don't care. I profit on most days. I also have losses on individual trades, daily.
Not interested in "convincing".
Carry On!