[csomar]

You have to understand the asset being traded and the environment. Kraken fees are around 0.1-0.2%. So the Market maker is making 0.4-0.6% if there is demand on USDT after this "dip". That's relatively little profit given the low volume.

So the market maker must be pretty certain that USDT is fine. Otherwise he'll demand a premium to offset the risk of holding USDT.

If anything the argument the OP gave suggests that traders have full faith in USDT.