We've been trading a strategy that is very volatile in the amount of buying power it uses. We have optimized it so that we very rarely go over our allotted buying power. There are no other safeguards we can add to our system to prevent this problem. All we can do is to be more cautious to never go over our allotted buying power, but that will hurt our returns drastically, as it will lower our returns on every day we trade, not just the days that require higher amounts of BP. Occasionally we get day trading margin calls, which means we have to wire money to our broker immediately, and they have to hold onto it for 2 days before they'll let us have it back (we can not cover these calls by liquidating positions--we have to wire in new funds). We now have all of our money in this fund, so the next time this happens, we will be in big trouble. Eventually they will eliminate our day trading buying power if we don't meet the call. What we want to do is acquire a line of credit so that we can cover these calls. We would just need to borrow the money for 2 days occasionally and could pay a high interest rate on it. BUT, the money needs to be available whenever we need it, with only one day notice. Our strategy is relatively stable and consistent in other regards (no big losing days). Is there a solution to our problem--perhaps some service a bank would offer? We would want to have $2m available to us, but less would be better than nothing. I have found articles that mention brokers being busted for making loans like this to their clients, so that doesn't seem to be an option. Thanks for any advice.