Funding, open interest and the crowd

Lesson four: funding, open interest and the crowd. Futures traders leave a trail you can read for free. What they pay to hold a position. How much money they have at stake. And which way most of them lean. Together, they show you where the risk is building.

Start with funding. A perpetual never expires, so it needs something to keep its price close to spot. When more traders want to be long, the perpetual drifts above the spot price. So longs pay shorts. Holding a long costs a little, holding a short earns a little, and the price is pulled back toward spot. When more traders want to be short, it flips, and shorts pay longs. So positive funding means the crowd leans long. Negative funding means it leans short.

Think of funding as rent. On most exchanges it's paid every eight hours, on some every hour. It's quoted per period, like zero point zero one percent. That sounds tiny. But it's paid on your whole position, not just the margin you put up. Say you hold a $10,000 long at ten times leverage, with $1,000 of your own money. If longs pay zero point zero one percent, that's $1 every eight hours. If the rate holds, you pay $3 a day, and $90 over a month. Nine percent of your margin, gone, even if the price goes nowhere. When the crowd gets excited, funding can run several times higher.

Next, open interest: the total value of all futures contracts still open. Every contract has a long and a short, and it's counted once. So when a new $1,000 long meets a new $1,000 short, open interest rises by $1,000. When both close, it falls back. On its own, open interest shows how much money is at the table. Now read it next to price. Price up with open interest up means new money is pushing the move. Price up while open interest falls means positions are closing, often shorts buying back. Price down with open interest climbing means new shorts are pressing.

So which way is the crowd leaning? That's the long-short ratio. Bentley's report shows it as accounts long: the share of trader accounts holding a long. One catch. Every contract still has a long and a short. So if seventy percent of accounts are long, the thirty percent who are short hold just as much in total. The ratio counts people, not money. The report's rule of thumb: above roughly sixty-five percent on either side, the crowd is leaning hard. Moves against it tend to get sharp.

Why sharp? Many in the crowd use leverage, and from lesson three you know roughly where their liquidation prices sit. Say Bitcoin is at $80,000, and a crowd of longs opened there. Longs at twenty times are liquidated roughly five percent lower, around $76,000. Longs at ten times, roughly ten percent lower, around $72,000. If price dips to $76,000, those longs are closed with forced market sells. That selling can push price down toward $72,000, which forces more selling. That chain is a liquidation cascade. Traders call these levels magnets, because so many forced orders wait there. Crowded shorts work the same way, upward. That's a short squeeze.

Careful, though. Crowded doesn't mean it's about to turn. A crowd can stay crowded for weeks, paying funding the whole time. Crowding shows you where the risk is. It doesn't tell you when. That's how Bentley treats it: as part of the backdrop it reads before it scores a setup. You can read the same numbers. Open Bentley's public report, linked on this page. Each coin shows its funding and accounts long. Further down, in the numbers section, you'll find open interest, and how it changed in the last hour. Bentley's read puts it into words.

Let's recap. Funding is rent on a futures position, paid on its full size. Positive funding means longs pay shorts. Open interest is the money at the table, and next to price it shows whether new money is pushing. The long-short ratio counts people, not money. And crowding shows where liquidations are stacked, not when price turns. In the next lesson, the one percent rule and position size. And remember, this course is education only, not financial advice.