That is neat trick you can apply on newbies. I explain it like this:
You have crossed LOBs .. target can either be moving in same or opposite direction. If it is moving in same direction, LOB intersection is its maximal possible range. If it is going in opposite direction, intersection is its minimal possible range. If the target is not going either way (like when making a zig), the intersection is exact range.
Still it needs good name .. what about zig trap ? Gee .. I hope bubbleheads will come with something better
