9 Summarizing Auction Activity fabio

Hi, and welcome back to the market mechanics course. This is market mechanics 103. And how do we summarize what we've learned, all of this auction activity in a chart that shows it? So, we said that these two contracts are matched, right? There's a buyers that's matched with a seller. It's a match. That's the new price. The candle opens. Now, let's add one more layer. Let's have a little table that summarizes for us aggressive buyers on the right hand side and aggressive sellers on the on the left hand side. So, that buyer that bought we place it here. So, two contracts here mean an aggressive buyer was ready to accept to pay a slightly worse price to get filled. This is this doesn't mean there were two contracts bought or there were two buyers. Yes, but there were also two sellers. Always remember that. And zero here because no contract was sold aggressively here. Another one comes, takes two contracts at 101. It's a match. Price moves up and we put those two contracts here. Big five contract order placed by an aggressive sellers. Each those two contracts at 99, those three contracts 98. So we place that five contract now that this is the new price. Two that were filled here and three that were filled here. and zero here of course. So this is what we call a footprint chart or a bid ask footprint chart. It basically summarizes for us what happened during the auction what caused price to move. What are the orders that pushed market in a specific direction? How many were they? both from the aggressive, you know, side and the passive side because if there were three three contracts sold, they were aggressively selling and passively buying at the same time. So the bid footprint basically tells us with a little bit more detail who was the aggressive and who was the passive.