Day-master strength is a ratio: your day stem against the other seven characters, and when what feeds you (your own kind and what produces you) is somewhat short of what drains you (what you produce, control, and are controlled by), or the season isn't on your side — that's weak. It's the commonest kind of chart: you're carrying a little more than you're holding, so you're often reallocating.
That explains a few things weak-chart people share. First, you read a room well — people short on resource have to see the field clearly. Second, you borrow leverage well — alliance, collaboration and finding backing aren't strategy for you, they're instinct. Third, you tire — not physically, but the same task takes a little more out of you than it takes out of a strong chart.
The tradition's advice for weak is to welcome what feeds you: learning, support, companions. It's a good prescription: a weak chart can be topped up, unlike a very weak one that has to go with the current. Where you'll recognise it: better in partnership than alone, a different person when backed, a visible drop after carrying something solo for a while. Running well, you're the best collaborator around: you know how to borrow, how to repay, how to use resource elegantly. Stuck, you grit — refusing help, treating going it alone as dignity. For this chart, finding backing isn't weakness. It's connecting the engine to the tank.