Prodigy Historic Trending provides the following additional facilities;

Unlimited signals per trend graph display; Display data over any time period; Retrieve batch graphs using your own batch names; Modify trends in real-time, "on-the-fly";Instantly switch back to real-time view of data, Vertical cursor can be positioned at any point across the trend and allows exact signal values to be read ;Provides seamless access to all recorded data; Zoom in on areas of interest ; Auto-scale signal ranges "on-the-fly" to improve clarity of small data changes; Real-time data smoothing;
View archived data directly from CD or file server ; Supports min, max and average graphing modes.

Included with Prodigy Classic and Complete.