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What is Lot Size?

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Understanding Lot Size

Lot Size is the minimum unit for trading and holding a contract. You must place orders and hold positions in amounts that are exact multiples of the contract's Lot Size. If your order doesn't meet this requirement, it will be rejected. You can find the Lot Size for each contract on its Contract's Specification page.
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Examples

For XBTUSD, the Lot Size is 100. So, you can order or hold 100, 200, 500, or 1000 contracts. But you can't order or hold 1, 5, 10, 35, 125, or 250 contracts.

 

What Happens When Lot Size Changes

Sometimes, the Lot Size of a contract might change. When this happens, your orders and positions might be reduced to the closest valid Lot Size. This could result in the system closing out the "odd lot" part of your position.

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