I've looked into it, but don't have enough historical data yet on North American Pools to validate that it works in the long run. Sometimes the bridge jumpers commit to a bet very early, but more often you see wagers flooding in at the last minute, which makes piggybacking on that information difficult to execute.
If you are familiar with python I have some scripts for automating minus pool alerts here:
https://github.com/pschubert24/minus_pool_alert
Scripts are kind of a work in progress. I haven't gotten around to fixing some issues with them.
