These are the situation which I considered higher risk :
- 2nd signal of trend continuation
- If previous day candle is long, today trading is of higher risk
- perhaps trend reversal
- violent spiky moving market
because of higher risk, I'd reduce trade quantity.
I once had 23 losing trades in a row in different markets, at no time did I think any were higher risk or any have higher chance of being profitable, at no time did any of my back testing show I could lose this often. But what I did learn from the experience, I didn't ask my back testing procedures enough questions, would not have changed anything I had done in making the system though, but I had not tested it over enough data, was only ten years of daily data. On the 24th trade was coffee and made three times the loss.
I understand where you would get your thinking of next trade have more risk, but I believe the first trade is more iffy than the 2nd, even confirmed trends can change trend and we get tagged for a loss, this is where the blunt of my losses in day trading happens but not longer term commodities as that system has very small win rate, but this ok cause been trading it this way for nearly 27 years, it is amazing how one would be ok with a system that seldom wins overall, but hedging allows me to make profits on losing trades, far greater than losing.
If previous day has extended daily range, I expect next day be more of tighter range and chop, so my automation would know my parameters for trading chop, but even though I have bias, automation does not, rather have it trade neutral as there been several follow through sessions.
I like the spikey rocketship patterns, steeper the price movement, faster it reverses and sometimes get lucky on the runners, no attempt of secondary bottom or top made(right shoulder), these often hand me nice scalps and occasion movement of a new trend getting in near the bottoms/tops for several points.
Only way size reduced for me is time of the day and how full the dome, first couple hours in ES, can get just about anything filled without fear of huge slippage on the getting out for me. I based all systems on the getting out to come up with size to put in. And some markets just don't even consider day trading like OJ and Lumber, but hourly is ok providing can hedge it somehow. Actually have to use stock options if that underlying has same pattern of optionless commodities.
I hope your scratch trades means you making one tick on them and letting someone else pay for you "ride". Fees really adds up.
I like reading your thread, good trading to you.