I use it to find key intraday Support and Resistance lines based on the previous days activity. It also gives me candidates for the following day such as stocks in a "volatility compression".
However, I'm not using Trade Prospector as much lately because I'm using Ravenquote and this program automatically draws my pivot points based on the formula I specify, Previous highs/lows, current highs/lows/open, Retracements, etc.
So, I just load any symbol in the chart and all my S/R lines automatically appear on the chart.
That said, I still believe Trade Prospector is a great tool if you trade with S/R lines. I think they are still going to make a realtime version that links with various quote providers.