Check prices and trade age
Most Recent uses the latest reported low-side trade. Stable Pricing uses its five-minute average. Check trade age and price disagreement; missing averages remain unavailable.
ScapeBenchOSRS High Alchemy guideCalculatorOSRS High Alchemy guide
Compare reported prices, rune costs and GE limits before choosing a training batch. A large margin alone does not mean your offer will fill.
Include every cost in the margin
Subtract the item's buy price and one nature rune from its high-alch value. A fire staff supplies the five fire runes required per cast.
profit = high alch value − buy price − nature runePlan around limits, liquidity, and cash
GE-limit profit assumes one full four-hour buy limit. Use volume filters to check activity, then budget your cash across items in the Alch Plan. Reported trades are not stock reserved for your offer.
1
Start with Stable Pricing and hide stale or volatile results when planning a larger purchase.
2
Set minimum profit, ROI, volume, and GE limit values that match your cash stack and patience.
3
Open an item's 24-hour history before buying. Check a small offer and recalculate profit at the price you can actually pay.
Which buy price should I use when recent and stable prices disagree?
All buy prices and the 100 gp nature rune cost below are hypothetical, not current market quotes or buying recommendations. For a 39,000 gp high-alch return, subtract your item offer and one nature rune. This example assumes you already equip a staff that supplies fire runes.
Most Recent: 37,500 gp
39,000 − 37,500 − 100 = 1,400 gp profit per cast. This represents one reported low-side trade; your offer might not fill at that price.
Stable Pricing: 38,650 gp
39,000 − 38,650 − 100 = 250 gp profit per cast. The five-minute average gives another comparison, but it does not reserve items or guarantee a fill.
Entered buy offer: 38,950 gp
39,000 − 38,950 − 100 = 50 gp loss per cast. Raising the offer to buy sooner can remove the entire reported margin. Check this price before committing to a larger batch.
Compare both modes, trade age, history and reported volume. If the recent trade is stale, its price is an older observation. If the five-minute average is missing, the comparison is unavailable. Neither a large margin nor reported volume proves that your purchase will fill. Use the price you can buy at for your own estimate.
For a 300 gp profit target with these assumptions, your maximum buy price is 39,000 − 100 − 300 = 38,600 gp. In Rune platebody's offer checker, set Nature rune cost for this check to your own amount and open Profit target per item. Use maximum buy price changes the local draft; it does not place an offer or promise a fill. The ceiling changes when the rune cost or profit target changes. Confirm the calculator's rune cost separately before saving an offer into your plan.
Compare recent and stable prices in the calculator →What Steady, Check, and Volatile mean
The percentage compares the latest successful buy price with the five-minute average buy price. A positive value means the latest price is higher; a negative value means it is lower. It measures price disagreement, not guaranteed availability.
The two prices are within 2% of each other.
The gap is between 2% and 5%; inspect the item history.
The gap exceeds 5%, so the displayed margin needs caution.
The five-minute comparison is unavailable for this item.
What each quick filter does
Quick filters apply several advanced filters at once. They are starting points, not claims that every remaining offer will fill.
Fresh profitable trades with basic volume and no large price gaps.
All items · Fresh trades · Hide volatile · Volume 5+ · Profit 1+Open Useful results →Higher GE limits, stronger volume, and no volatile price gaps.
All items · Fresh trades · Hide volatile · Limit 70+ · Volume 25+ · Profit 100+Open Bulk results →Free-to-play items with fresh, nonvolatile profitable trades.
F2P only · Fresh trades · Hide volatile · Volume 5+ · Profit 1+Open F2P results →Larger per-item profit with recent volume and no large price gaps.
All items · Fresh trades · Hide volatile · Volume 5+ · Profit 500+Open Margin results →Plan an affordable F2P batch
A worked 1 million gp example shows how a higher buy offer changes profit, how much cash a batch needs, and why its cast time may be shorter than your session target.
Read the F2P session guide →OSRS high alch calculator FAQ
What is the best item to high alch in OSRS?
There is no permanent best item because player prices and available volume change continuously. A useful candidate has positive profit, a recent believable price, enough trading volume, and a GE limit large enough for your session. Sort the live table by profit, ROI, or volume, then compare the GE limits for your session.
How many high alchs can you cast per hour?
High Level Alchemy can be cast once every five game ticks, or about 1,200 casts and 78,000 Magic XP per hour when performed continuously. Buying items and banking can reduce the practical rate.
Can free-to-play players use this calculator?
Yes. Select the F2P filter preset to exclude members-only items. High Level Alchemy requires level 55 Magic, one nature rune, and five fire runes per cast; equipping a fire staff supplies the fire runes.
Where do the live OSRS prices come from?
Item mappings, current trades, five-minute averages, and on-demand history come from the community-maintained OSRS Wiki real-time prices API. The calculator caches requests and shows stale or missing states instead of silently substituting invented prices.