A free tool that finds Grand Exchange items worth buying low and selling high — ranked by realistic profit after the real tax. No login, no ads, no catch. Here's exactly what it does and, just as importantly, what it can't do.
Selling on the GE costs a 2% tax (since 29 May 2025), but with two rules people forget: it's capped at 5,000,000 gp per item, and items selling for 49 gp or less are exempt, as are a handful of items like bonds. Every margin here is computed after that real tax — so cheap items and bonds aren't wrongly hidden, and ultra-expensive items aren't over-taxed.
Instead of a single average, the buy/sell targets are percentiles of recent prices, weighted toward the last few hours (older data counts for less). That keeps the targets tracking the market you're actually trading in right now, not last week's.
Those percentiles start as sensible defaults. A backtest then replays each item's real price history and asks: which buy/sell percentiles would have actually made the most money? Crucially it uses no lookahead — at every step the bands are built only from past data, never the future (that's the #1 way a backtest lies to you). A flip only counts when a buy would have filled and then a sell would have filled, profited at real prices after tax. Items whose learned bands hold up (enough real, profitable flips) get a green ★ badge and use those bands; everything else falls back to safe defaults. Treat the learned numbers as a strong starting point, not a promise.
Profit is margin × how many you could realistically buy and sell in a 4-hour buy-limit window (from real traded volume) — not margin × a buy limit you'll never fill. RECUR shows how evenly an opportunity recurs across the day (steadier = more trustworthy), and VOL% shows recent price volatility (shorter bar = calmer).
A fat margin can still be a bad flip if it ties up your whole bank or you can't sell out. So every row shows CAPITAL (the gp you actually deploy at a realistic size), EXIT (roughly how many hours it'd take to offload that position at the item's average volume — lower is safer), and a RISK rating that blends exit-time with price volatility. Use the filter boxes up top as your own cutoff: cap the capital you're willing to risk, set a minimum ROI and minimum volume, or hide anything that'd take too long to exit. The header also sums the capital to work the whole board and the theoretical ceiling (margin × full buy limit across every item) — handy, but remember the ceiling assumes you fill every limit, which crowding and volume rarely allow.
Live prices come from the excellent free OSRS
Wiki real-time prices API. To be a good citizen, this site polls it on a schedule from a single
server and serves everyone the cached result — so a thousand visitors don't become a thousand hits on a
free community API. There's a raw /api/flips JSON feed if you want to build your own thing.
This tool only shows you the data; you place every trade by hand. Automating the Grand Exchange — bots, auto-clickers, scripted buying/selling — breaks Jagex's rules and gets accounts permanently banned. "Providing liquidity with a bot farm" sounds clever but it's just botting, and it's not worth your account. The honest version of that idea is what a human flipper already does: buy the bid, sell the ask, and the volume/risk signals here help you do it sensibly.