Price Volume Leaders provide an insight to the most significant stocks based on the value of the shares traded, as opposed to Volume Leaders which only takes into account the number of shares traded. For example, 1 million shares traded at $2 has a value of $2M (found on the Volume Leaders page) where 100,000 shares traded at $100 has a value of $10M (found on the Price Volume page). Many market analysts would consider Price Volume to be more relevant.
Weighted Alpha is a measure of how much a stock has risen or fallen over a one-year period with an emphasis on the most recent price activity. A stock whose price has risen over the one-year period will have a positive Weighted Alpha. A stock whose price has not changed in the period will have a small Weighted Alpha and a stock whose price has dropped over the period will have a negative Weighted Alpha.