Trade-Up Contract

The Trade-Up Contract is a crafting system in Counter-Strike 2 that allows players to exchange 10 skins of the same rarity tier for 1 skin of the next higher rarity from one of the input skins' collections.

How It Works

Select exactly 10 weapon skins of the same rarity
All skins must come from collections that have a higher rarity tier available
Submit the contract
Receive 1 random skin of the next higher rarity from one of the input skins' collections

Rules

Input: 10 skins of identical rarity (e.g., 10 Mil-Spec blues)
Output: 1 skin of the next rarity tier (e.g., 1 Restricted purple)
Collections matter: The output skin is randomly selected from the higher-rarity skins of the collections represented in the input
StatTrak: If all 10 inputs are StatTrak, the output will be StatTrak. Mixing StatTrak and non-StatTrak produces a non-StatTrak output
Float calculation: The output's Float Value is based on the average float of inputs (see below)

Float Value Calculation

The output skin's float is not random — it is calculated:

Output Float = (Average Input Float) × (Max Float - Min Float) + Min Float

Where Max Float and Min Float are the float range boundaries of the specific output skin received.

Example

10 input skins with average float of 0.10
Output skin has float range 0.00 to 0.50
Output float = 0.10 × (0.50 - 0.00) + 0.00 = 0.05 (Factory New!)

This means traders can manipulate output float by carefully selecting low-float inputs.

Profitable Trade-Ups

Trade-up contracts can be profitable if:

The expected value of outputs exceeds the cost of inputs
You target specific valuable skins by loading the contract with collections that contain them
You use the float formula to ensure desirable wear conditions

Controlling Output Odds

Since the output skin is randomly selected from collections represented in the input:

Using 9 skins from Collection A and 1 skin from Collection B gives a 90% chance of Collection A output and 10% chance of Collection B output
This allows traders to weight outcomes toward specific desired skins
Professional traders use spreadsheets and tools to calculate expected value

Trade-Up Tiers

Input Rarity	Output Rarity
Consumer Grade (White)	Industrial Grade (Light Blue)
Industrial Grade (Light Blue)	Mil-Spec (Blue)
Mil-Spec (Blue)	Restricted (Purple)
Restricted (Purple)	Classified (Pink)
Classified (Pink)	Covert (Red)

Note: You cannot trade up to knife/glove rarity (Extraordinary/Gold).

Risks

Trade-ups are one-way — input skins are destroyed permanently
Output is random within the eligible pool
Market prices fluctuate, potentially turning profitable contracts into losses
Rounding in float calculations can produce unexpected results