Quote from Whisky:
Are you using some sort of position sizing algorithm in the vein of a % of Optimal F or Kelly or how do you increase your size as you win more, if you do?.
Some brokers pay you for orderflow if you use limit orders and have a lot of volume.
This is something I need to put the work and research into as it will likely produce better returns... as such I'm open to suggestions.
Right now I allocate capital to models relatively evenly based on my end-of-day total fund balance (I have to do this as capital moves in and out with some frequency, usually monthly, sometimes weekly). The models are segregated by dynamic so as to avoid correlation, like vola. arb&breakout and several forms of mean reversion. They each get allocated a percentage for the concept - i.e. several models can fall into one concept and at the moment I trade 3 distinct concepts with several execution models grouped under the concept. Then the fixed per-trade capital is set based on that percentage. I then limit a concept from taking too many trades, i.e. to never exceed a set amount of the total fund base. Sometimes I miss trades as a result, but, there are days when I'm glad I didn't take those extra trades, i.e. I try to never be overwieght capital in any one concept for any given day.
An example: say I have 100k AUM and 3 concepts with 2 execution models each. I allocate 33k for each concept at 1.5k per trade each and no execution model can take more than 11 trades, each concept no more than 22 trades.
I monitor a ton of products each day, so this is all fully automated. Somedays everything fires and somedays I get just a few trades.
So as the fund grows the trade sizes grow, its basically fixed fractional and if I can figure out something better and simulate it... well, I haven't figured out a good way to do that yet...
Per the order flow, I use buy/short stops @ market almost exclusively, and I get "picked off" quite often as it is

. Limits, and I've tried to use em', have never worked well for me. Foremost, I want to get filled. Limits always fill the losers and *usually* the winners.
Mike