Liquidity Pool

A pool is not a line on your chart. It is the pile of resting orders sitting at and just past that line. The whole term lives in that distinction. ### Why a cluster of stops is liquidity A stop is a promise to trade at the market once a price is touched. A cluster of stops is therefore a queue of counterparties who have already committed to trading, at a known price, whether they like it or not. That is why size is drawn to it. A large buyer needs sellers. When the stops of longs (the sell-side liquidity resting below price) fire, each becomes a market sell, and market sells are exactly what a large buyer needs to fill against. Your protective stop, the moment it triggers, is somebody else's entry. ### The clustering is documented, not folklore Carol Osler, then at the Federal Reserve Bank of New York, read an actual order book: almost 9,700 stop-loss and take-profit orders at a large FX dealing bank between 1 September 1999 and 11 April 2000 ([NY Fed Staff Report 125](https://www.newyorkfed.org/medialibrary/media/research/staff_reports/sr125.pdf)). If traders scattered orders evenly, each two-digit price ending would hold about 1 percent of them. Instead roughly 8.7 percent sat at rates ending in 00, with smaller clusters at 50, then other endings in 0, then endings in 5. Endings like 25 and 75 had no special pull. Round numbers are crowded because people choose them, not because the market owes them anything. ### The pool sits just past the level, not on it This is the easiest thing to get backwards, and it is the most useful thing in the data. In that same book, stop-loss *buy* orders clustered just **above** round numbers and stop-loss *sell* orders just **below** them. Osler found 7.4 percent of stop-loss buys at rates ending 90 to 99, against almost twice as many, 14.4 percent, ending 01 to 10. Take-profit orders, by contrast, sat *on* the round number. So the obvious level is where the crowd's targets rest, and a few pips past it is where the crowd's stops rest. That is why a sweep overshoots instead of stopping politely at the high, and why "price tagged the level and reversed" and "price broke the level and ran" are both normal. Which one you get depends on which pile got hit. Once a pool goes, the move feeds itself: a triggered stop buy is a market buy, which lifts price, which triggers more stop buys. Osler's [follow-up paper](https://www.newyorkfed.org/medialibrary/media/research/staff_reports/sr150.pdf) found that rates trend unusually rapidly once they reach the levels where stop-loss orders are known to cluster. ### Be honest about what this proves The data show the orders are there and that price moves fast once they go. They do not prove anyone hunted them deliberately. In that follow-up, Osler files intentional triggering under market lore, while noting the activity has a name among traders: "running the stops." This is also one bank's book, in FX, a long time ago. The term does not need intent to be true. It only needs the crowding to be real, and the crowding is real. ### Working with pools - Mark them before the session: EQH and EQL, prior day high and low, obvious swing points, round numbers. - Treat a pool as a destination, not a wall. Expect price to test it. - Then ask the uncomfortable question: where is *your* stop? If it sits a few pips past the same obvious level as everyone else's, it is not protection. It is inventory.