Funding tells you which side is paying to hold. Positive means longs pay shorts, which means the perpetual is trading above spot, which means demand for leveraged long exposure exceeds demand for the other side.
That is a statement about positioning and cost. It contains no claim about what happens next.
Why the fade is so tempting, and so unreliable
The reasoning feels sound: everyone is long, so there is nobody left to buy, so it must fall. The flaw is that crowding has no natural time limit. Funding can stay strongly positive through an entire trend, and the trades that fade an extreme are systematically fighting the thing that is actually moving price.
The cost is asymmetric too. A fade against a persistent trend pays funding and loses on price, and the funding you collect is small compared with the move you are standing in front of. Being early is expensive twice.
What it is genuinely good for
Costing a hold. If you intend to carry a position for days, funding is a known, quantifiable drag, and it belongs in the plan before entry rather than as a surprise in the P&L.
Sizing risk. Heavy one-sided funding means heavy one-sided leverage, and leverage is what turns a move into a cascade. It does not say a move is coming; it says that if one comes, it will travel further than the news would justify.
Locating the crowd. Read per venue, it tells you where the leverage actually sits.
The framing that keeps you honest
Funding describes the fuel, not the spark. It says how violent a move would be if one occurred, and stays silent on whether one will. Every disciplined use of it follows from that sentence — and it is the same discipline as reading holder concentration: a risk measure, never a signal.