www.alcyone-ephemeris.info has a free ephemeris for download - however I have a question that maybe someone will be able to answer?!

How can you tell when mercury changes speed? I've backtested Larry Pesavento's book (he gives details for 1994-1995) and this is one of the best indicators for either a change in trend or an increase in thrust in the same direction as the previous trend.
I've downloaded the above ephemeris and looked at the dates but can't seem to work it out?....

Dates are:

1994:
Jan 19
Feb 11
Feb 20
Mar 5
May 2
Jun 12
Jun 24
Jul 5
Aug 8
Oct 9
Oct 20
Oct 29
Nov 26
Dec 7

1995
Jan 1
Jan 25
Feb 4
Feb 16
Apr 18
May 24
Jun 5
Jun 17
Jul 24
Sep 24
Sep 22
Oct 4
Oct 13
Nov 4