Right now I'm using on my 400K account (running at 25% annualised risk target a year) about £102K in margin; so about 25.5% cash.
However this will vary depending on how close I am to HWM and signal strength. Right now I'm running at about 73% of average risk. At average risk then my margin usage would be around 35%.
To take a few other days as a sample
April 1st: 29.5%
Jan 1st: 30%
2014:
Sep 1st: 29.4%
June 1st: 37.8%
The numbers are perhaps less than you might expect (I have never been about 50%), perhaps because I won't always have positions in all 40 markets unless I have sufficiently strong signals in all of them, and also because margins aren't as chunky in say Eurodollar as they are in Emini's.
But it's reasonable to say I'll use between 20 and 50% of account value as margin, averaging 35%.
Thanks a lot for this. It gives a good idea on what margin (and thus capital requirements) one can expect. if max DD is 25% and margin requirement is 20-50%, this still gives 25% extra cash in the account.
Have a good day!!