Reverse line movement can’t be found before it happens, but there are signs to look for. For example, a reverse line movement may occur if a team is an overwhelming public favorite with a lot of early action.
When it occurs, many sportsbooks may not react fast enough or not change their odds at all to reflect the change. Finding reverse line movements after they happen is easy by just looking at the betting odds and line movement and then comparing the public percentages on each side.