What is Minimum Order Size?
To facilitate trades for users more efficiently, Crypto.com Exchange implements Minimum Order Size requirements, ensuring that all orders meet a set threshold. This Minimum Order Size requirement applies only to spot trading. For derivatives trading, the Minimum Order Size is determined by the quantity tick specified on the trading rules page.
Minimum Order Size for Each Order Type
1. Limit Orders
The formula to derive the Minimum Order Quantity of Limit Orders is:
Minimum Order Quantity = max(Minimum Quantity Tick, Minimum Order Notional ÷ Effective Order Price)
For buy orders Effective Order Price = min(Limit Price, Best Ask Price)
For sell orders: Effective Order Price = Limit Price
Example:
The Minimum Order Quantity is 0.00001 units
The Minimum Order Notional is US$1
The Limit Price assumes the value of BTC to be $90,000
The Minimum Order Quantity for a sell order would be 0.000011 BTC, as calculated by:
Minimum Order Quantity for a sell order = max(0.00001, 1÷90000) = max(0.00001, 0.000011) = 0.000011 BTC
Applying the Roundup Calculation, the resulting value is 0.00002 BTC. The Roundup Calculation is further explained below.
Notes:
The Minimum Notional Value for all Spot trading pairs is US$1.
The Minimum Notional Value also applies when customers place orders through the application programming interface (API).
Effective Order Price is the price at which a Market Order is most likely to be executed when taking market depth and price volatility into consideration. It may differ from the expected value when markets are volatile.
For cross pairs like ETH/BTC,the Effective Order Price should be multiplied by quote currency index price additionally. For example:
When we trade ETH/BTC, the price is around 0.028, BTC index price is 100000, minimum quantity tick is 0.0001ETH, minimum notional value is 1 USD. Then the Minimum Order Quantity = max(0.0001, 1 / (0.028*100000)) = max(0.0001, 0.000357) = 0.000357.
Applying the Roundup Calculation, the resulting value is 0.0004ETH.
2. Market Orders
The formula to derive the Minimum Order Quantity of Market Orders is:
Minimum Order Quantity = max(Minimum Quantity Tick, Minimum Order Notional ÷ Effective Order Price)
For buy orders: Effective Order Price = min(Mark Price, Best Ask Price)
For sell orders: Effective Order Price = Mark Price
Example:
The Minimum Order Quantity is 0.0001 units
The Minimum Order Notional is US$1
The Effective Order Price assumes the value of ETH to be $3,300
The Minimum Order Quantity for a sell order would be 0.000303 ETH, as calculated by:
Minimum Order Quantity for a sell order = max(0.0001, 1÷3300) = max(0.0001, 0.000303) = 0.000303 ETH
Applying the Roundup Calculation, the resulting value is 0.0004 ETH. The Roundup Calculation is further explained below.
3. Roundup Calculation
The Minimum Order Quantity is determined by its Quantity Tick Size. Since the quantity needs to be rounded up to its allowable precision, the calculated value will be adjusted to meet the requirements of the Minimum Notional Value and Quantity Precision. If the requirements are not met, the order will be rejected.
Following the example presented in the ‘Limit Orders’ section above, the resulting figure of 0.000011 BTC is rounded up to 0.00002 BTC to meet the requirements.
Learn more about the Quantity Tick Size for each instrument here.
Can I see the Minimum Order Size in the UI?
When entering your Order Value in the Crypto.com Exchange, a tooltip indicating the minimum input value will appear.
How will I know if my order is rejected due to the Minimum Order Size?
If your order is rejected because it does not meet the Minimum Order Size, you will see a "BELOW_MIN_ORDER_SIZE" rejection message in the API response. For more information, please refer to the API Documentation.