Thanks jcl.

Re. moving a system to another account: Please re-read the example above. The question was not about how much money to leave in the old account. The question was what Margin setting to use on the new account when only part of the balance has been transferred.

Re. risk per trade: I'm very well aware of the need to monitor - I've already had to add funds twice to (narrowly, barely) avoid margin call on Z5. My question is about stepping back and looking at the "big picture" interrelationships of the various factors/parameters and how they all "hang together" consistently. If I've Tested to determine the CR for a given Margin/Risk setting, and funded the account with that CR balance, how then does Z3 open a trade with risk exceeding the CR/balance? That seems inconsistent to me, and makes me suspect the veracity of Test results.

Thanks.