On the custom column, there is an option for last Traded price (LTP) which is fine, but a great help might also be for lowest price.
If this lowest price, could be further split, by pre-in-play, and in-running, that would be even better.
Lowest price traded - pre-in play and in-play column
If u get round to doing this, the Highest price pre-in-play, probably would be good as well (especially, if maybe, a servant could call the column).
Yes, if either a servant or guardian could call the field, (to test whether to do something), it would be v useful.