Penguin mask

item #12428 · buy limit 4 · 19 days of history backtested

Latest price: 16,089 gp instant-buy · 11,183 gp instant-sell
Last 24 h average: 15,542 gp high · 19,672 gp low · 32 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%	7.8k	7.8k	7.9k	6.8k	6.1k	5.6k
8%	9.4k	9.4k	9.1k	7.4k	6.7k	5.4k
12%	9.2k	9.2k	9.0k	7.3k	6.6k	5.3k
16%	10.8k	10.8k	10.4k	8.1k	6.5k	5.2k
20%	10.6k	10.6k	10.8k★	7.8k	6.3k	5.1k
25%	10.7k	10.7k	10.4k	7.5k	6.0k	5.0k

Optimal buy 20% / sell 85% → 16 flips, 10.8k/day per unit (~18.9h hold) vs Default 12% / 93% → 9 flips, 6.6k/day (+64%)

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.