Editor's Note: Any reference to TheStreet Ratings and its underlying recommendation does not reflect the opinion of TheStreet, Inc. or any of its contributors including Jim Cramer or Stephanie Link. Trade-Ideas LLC identified Peregrine Pharmaceuticals ( PPHM ) as a weak on high relative volume candidate. In addition to specific proprietary factors, Trade-Ideas identified Peregrine Pharmaceuticals as such a stock due to the following factors: 'Weak on High Relative Volume' stocks are worth watching because major volume moves tend to indicate underlying activity such as material stock news, analyst downgrades, insider selling, selling from 'superinvestors,' or that hedge funds and traders are piling out of a stock ahead of a catalyst.