My take on it would be the Sklansky's Bucks would be the EV of the Hands that are of starting value and the % of times they pay-out.
In a comparison to the players value out of the hands that rate as Sklansky's combination of "Valued Hands" entered into the data base as the 'Line' of comparative. Suited connectors and AA,KK,A-K,QQ,A-Q etc.
through on down to PP and gapper hands. K-J, Q-10
The Green line is the above or below what the actual hand played for and at what EV it finished for the 'Value'
It looks to me like a starting for
bankroll Progress,
On the other hand it seems like a MTT graduation Graph of chip values as the Blinds increase.
As the Graph is showing the # of Hands Played and the # of Hands omitted. Seems odd that 260 hands were skipped out of 3600+.
If this is a progressive analysis and the players Bankroll is increased by leaps as the # of hands increases, given wins and losses through the drops and peaks.
Hope this gives some clues to make sense of it, or helps to have different 'take' on it.
Other than that I rally can't say what it represents since I cannot use the said program, to understand it more.
And figure out what the purpose serves. A Sklansky HH translator similar to Poker tracker in a Play by Play of one's Total HH in motion..(as per the Play button on the top??)
Have you Queried the source?? Good Luck on the answer~ Ask Isaac Isomov! LOL~