Why don't you allow people to commit at certain price breaks? For instance, I'm not sure I'd want them at $58, but the price difference between $45 and $49 is negligible to me, so I'd commit at that price.
I think this would have an added effect of showing more people actually getting in on certain drops instead of watching and waiting for the right moment (and a lot of times, probably forgetting to get in at the end...).
esoomenonaIf changes are going to be made to that particular feature, I've always felt that the grey bar for people who have committed to the lowest price should start at orb on the the right end and accumulate from right to left, meeting with the green bar in the middle.
I think this would have an added effect of showing more people actually getting in on certain drops instead of watching and waiting for the right moment (and a lot of times, probably forgetting to get in at the end...).