Quote from illiquid:
...A series of winning trades would indicate you are in rhythm with the markets, losing trades = out of rhythm...
So when would you expect your "luck" to turn and at which moment you start bringing size back to max? You can easily have a following situation where you have 1W, 1L(-), 1L(-), 1L(-), 1W(bringing size back to max), 1L. Also, Apex82 made a valid point on probability in any method, so by reducing size after every losing trade you lose faith in your method, at some point I wouldn't be surprised to see losing trades become larger than winning ones.
If your % win is ~80, then why would you reduce size after a losing trade? I mean you are the one that referred to a person's ability to trade 1 lot and being in sync with a market by placing good entries, so I assume you have a favourable % win rate. I would understand it if your % win rate was below 50, but then you wouldn't be in sync 50% of the time anyway. See the logic?
