Why perpetual futures need funding
A perpetual future never expires, so there's no settlement date to pull its price back to spot. Funding is the fix: at regular intervals (often every 8 hours), one side of the market pays the other a small percentage, nudging the perpetual price back toward the underlying.
It's a peer-to-peer payment between traders, not a fee the exchange keeps. That's why it can be income as easily as a cost.
Reading positive vs negative funding
Positive funding means longs pay shorts — the market is crowded long and leveraged buyers are paying to hold. Negative funding means shorts pay longs — the market is crowded short.
Extreme funding in one direction is a crowding signal. Heavily positive funding can precede long squeezes; heavily negative funding can precede short squeezes. Funding doesn't time the turn, but it tells you which side is paying to be there.
Trading with funding, not against it
If you're going to hold a position across funding intervals, factor the rate into your plan: paying 0.05% every 8 hours is roughly 0.15% a day, which compounds against a slow trade.
A practical habit is to check funding before entering and lean toward the side being paid when your thesis is otherwise neutral. CoinCrypTick's funding-rate dashboard lets you sort rates and place a funding-aware buy/sell from the same view.