Predicted lift is a score you'll find on segments you build in Radius or segments Radius recommends for you. Predicted lift uses your historical success rate in its calculation. Here's how everything adds up.
Historical success is calculated like this.
Historical Success = Won / (Won + Lost) for your entire CRM for the selected Radius goal.
Predicted lift is calculated like this.
Predicted Lift = Predicted Success Rate (for the segment) / Historical Success Rate for your entire CRM for the selected goal
So, for example, if Goal A has a Historical Success Rate of 40%, and a given segment has a predicted success rate of 84%, the Predicted Lift score is 2.1x. This means that Radius predicts that deploying records from that segment will provide more than two times your historical success.