d08,Quote from d08:
Not exactly. When there is high correlation selling, the positions would be initiated during the first phase, for example, between 9:30 and 11:00. The second phase, from 14:00 to 16:00 would also trigger signals. Randomizing entries loses time priority. So if you could take 20 trades, you would already have full exposure before the second phase could start, you are essentially betting that the trades from the first sell-off outperform those from the second sell-off in the following days - but in my experience, this often is not the case.
Monte carlo is better than nothing but the only bulletproof way to know is with intraday data.
You are right about the time priority during the day. I often notice I get maxed out on positions during a market drop near the open. If the back tester takes a random sampling based on EOD data, then it would take some positions near the close on a down trending day that I would be unable to take. I always suspected paper trading was cherry picking the trades somehow, so this makes sense.
I donât think this spells the death of my strategy. Sensing this shortfall in real trading, I have tried to compensate for this discrepancy between real life and paper trading. I keep tight reigns on the max number of positions I can take. Then each day, I gradually increase the number of allowed positions, until the market reverses. In effect, trading the account as a cash account at first, and then slowly adding margin buying power to the mix.
Another feature is that I have a max position size defined before I enter a trade. The first trade is 1/3 position size, and if triggered in subsequent days, the next trade is 2/3 position size. I know many will look at this as averaging down on losers, but profit factor and percent profitable goes up when I do this. It is different, I think, than just buying more every time a stock drops 25 cents or whatever. Also, since the subsequent trade has separate entry criteria, I view this as a separate strategy that just happens to be on the same symbol. Institutions do this all the time when entering positions, with a resulting average price paid. Being well capitalized is important, to be able to take advantage of trades when they present themselves.

