CS Contractor takes a snapshot of every tracked item every three hours — price, listings, buy orders, sales — and reads the three patterns that come before a price spike. It won't tell you what to buy. It shows you where supply is vanishing, where buyers are stacked up behind every listing, and where that queue is still growing.
Free while in beta. No Steam login, no API key, nothing to install.
Pump alert: buy wall at 367.4x offer volume with 26.7% daily turnover
Read it as: 367 open buy orders queued behind every single listing, while 26.7% of the remaining supply sells out each day.
Each one is a plain ratio between numbers Steam already publishes. The point isn't the maths — it's that nobody checks them across 15,000 items every morning.
How fast the market eats through its own supply. Listings falling while sales hold steady means the float is being absorbed, not traded.
Fires when a fifth or more of the remaining supply sells out in a single day.
How many buyers are queued behind every listing. A tall wall stops the price falling and is expensive to fake, so it usually means someone real is committed.
Fires when more than 50 open buy orders sit behind each listing, with supply shrinking, turnover above 15% and the top order within 15% of the asking price.
How fast the queue of open orders is filling up. An order is money committed at a price, so a queue growing against flat supply is accumulation before it reaches the price.
Fires when open buy orders climb by 20% or more across the comparison window.
Turnover — the share of listed supply that sells in a day — is the single most useful number on the site. It's on every row, colour-coded.
Supply dwarfs demand. Too heavy to move, too heavy to manipulate.
Healthy trade. Worth watching for a slow climb while the price sits still.
Supply is visibly draining each day. This is where most pumps are born.
Demand has outrun supply entirely. Expect violent, unreliable pricing.
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