You should instead look into using Collection Stats on HSReplay. This plugin may not be updated past 0.8.4, however forks to keep it alive are welcome.
Original readme:
It allows to keep track of cards you have in collection and shows which type of pack will give you the biggest probability of opening missing cards.
Main plugin window:
Collection editor:
To add a card into collection, use left mouse click. Clicking Enter in "Search..." text box will add in collection the first card. To remove card from collection, use right mouse click.
Plugin settings window (access through HDT options -> Plugins -> Collection Tracker -> Settings (at the bottom of window)):
Unzip HearthstoneCollectionTracker.zip archive from release page to Plugins folder in root of your Hearthstone Deck Tracker. Then enable it in the Settings menu.
If after copying the .dll file plugin does not appear in settings menu, go edit properties (right mouse click on dll -> Properties) and click "Unblock" button.
