Why is EV moving downwards?

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I don’t understand why EV is moving downwards while I’m betting on positive EV bets (3%+) ?

Hi giankar.
How far out are you betting? There is no guarantee to predict what way the markets will move during the time until start of the match. With +EV bets we normally beat the closing line, but not always.
I usually advice against paying to much attention to the weekly graph (your CLV is still up!) and instead look on the monthly graph to see the overall CLV trend.
Suggested reading is the explanation of the CLV and why it is an important metric from the web manual.
Value betting web manual