First of all, pay attention to standard events library, there is a whole section devoted to planetary speed.
It is here:
and follow this:
I would like to recommend to start with astronomy. Look how Mercury's speed is changing in time:
Or if you want to calculate the speed between two planets Mercury and Venus fill out this form:
This is a diagram for this speed, pay attention to spikes in speed diagram:
Some ideas of planetary speed usage in financial astrology came from Bayer's book.
The Bayer's rule #27 sounds:
"Big tops and big major bottoms are when Mercury's speed in Geocentric longitude is 59 minutes or 1 degree 58 minutes."
In ULE editor you can create this event this way:
Or another rule #2, sounds "Trend goes down within 3 days when the speed difference between Mars and Mercury is 59 minutes.":
Also I recommend to pay attention to Neural Network model based on planetary speed: http://www.timingsolution.com/TS/Uphistory/upgrade_27.doc