3%-5% on that position, not the whole portfolio. As for the dime dance, many stocks have spread greater than that, I prefer setting stops at "rational " sop levels, like breach of bottom of the box, or in some instance, marking a new LOD (particularly when a specific stock is counter trending the general market), a simple dime rule might also be ineffective for generals and colonels... (stocks selling between $40 and $100 per share)