The Prance allows you to install it the usual way by importing it into Ninja, without any issues.
The OrderFlow won't allow you to, with error message of..."may contain duplicate names..."
Once installed, the Prance, there are 2 strategies noted in strategy tab. One is the Prance and the other is the Reversal.
Once enabled, not much of anything showing up on your charts.
The Prance just simply has some EMAs on its chart, 5, 122 and 63.
The Reversal, just simply has tiny little yellow and blue dots that represent the CAHOLD (close above high of low day and CBLOHD (close below).
As far as for the OrderFlow, one must unzip the file from The_Evil, copy and paste the 2 files DLL and CS into Bin/Custom. Restart Ninja.