Do I only risk 2% of the size of the order or the size of the order on margin. For example, let's say I have $100K in an account and but 100 shares of a $100 stock for $10,000. Do I put a stop in at $9,800 (2% of $10,000 subtracted from $10K) or $9,900 (2% of $5,000 subtracted from 10K)?