Here is a short recap on how you can leverage all the MTGAHelper powerful collection and deck tracking features. The core of the system lies in which decks you are tracking so this is quite important.
1. Go to the Deck sources page and select a bunch of sources that you want to track decks from. You can track decks from various renowned streamers or from the current Meta. Your tracked decks will drive all the calculations for your missing cards weightings.
2. On the My tracked decks page, you can then view all the decks from all the sources you've chosen to track, while being shown which ones you can currently build and which ones your are closest to completing. You can also fine-tune which decks you're tracking ever more. For example, if you want to track only a few decks from a given source, you can stop tracking decks on an individual basis here.
3. Once you are happy with your tracked decks, you'll be able to see the effects having a list of tracked decks has on the calculation of the weights of missing cards. For example, in the Missing Cards Summary page you'll be able to see which packs you should be opening to build the decks you're tracking. On the Missing Cards Details page you'll be able to see which individual cards are the highest priority for you. The higher the weight of a card, the more decks you're tracking include it.
4. Finally, the draft helper is also driven by your tracked decks. You will get useful Raredrafting information during your draft picking including the weight of missing cards, helping you make better decisions about choosing to raredraft in order to complete your tracked decks with cards coming up in the draft. Here's how it will look: