Black demon mask

item #20026 · buy limit 4 · 18 days of history backtested

Latest price: 18,929 gp instant-buy · 16,230 gp instant-sell
Last 24 h average: 22,565 gp high · 16,177 gp low · 37 traded

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Buy limit4

TypeMembers

Notenot in the current top scan — backtest below still applies

Price chart

drag to pan · scroll to zoom · hover for values

Candles use the GE's average instant-buy (wick top) & instant-sell (wick bottom) per period; bodies show period-to-period mid-price moves — the GE publishes no true open/close. buy bandsell band

Backtest — profit/day per unit by band

Each cell replays this item's history with that buy/sell percentile pair, no lookahead (bands from past data only). ★ = best. Hover a cell for flips & hold time.

buy↓ sell→	75%	80%	85%	90%	93%	97%
5%	26.3k	26.3k	26.3k	26.3k	26.3k	26.3k
8%	37.6k	37.0k	37.0k	37.0k	37.0k	37.0k
12%	39.3k	38.7k	38.7k	38.7k	38.7k	38.7k
16%	39.0k	38.4k	38.4k	38.4k	38.4k	38.4k
20%	40.9k★	40.3k	40.3k	40.3k	40.3k	40.3k
25%	40.8k	40.2k	40.2k	40.2k	40.2k	40.2k

Optimal buy 20% / sell 75% → 23 flips, 40.9k/day per unit (~8.1h hold) vs Default 12% / 93% → 21 flips, 38.7k/day (+6%)

Bands are a starting point, not a promise — the fill model is simplified and popular flips crowd (your buy gets bid up, your sell pushed down). How this works →

Unofficial fan project — not affiliated with or endorsed by Jagex. Data from the OSRS Wiki real-time prices API. A game, not financial advice; nothing here is automated and you shouldn't automate it (it's against Jagex's rules).

For information only - not financial advice. In-game Grand Exchange prices fluctuate and flips can lose value; trade at your own risk.