!!! info "[OrderLeg](/../../schemas/order_leg)"
    |Name<br>`Lite`|Type|Required<br>`Default`| Description |
    |-|-|-|-|
    |instrument<br>`i` |string|True|The instrument to trade in this leg|
    |size<br>`s` |string|True|The total number of assets to trade in this leg, expressed in base asset decimal units.|
    |limit_price<br>`lp` |string|False<br>`0`|The limit price of the order leg, expressed in `9` decimals.<br>This is the number of quote currency units to pay/receive for this leg.<br>This should be `null/0` if the order is a market order|
    |is_buying_asset<br>`ib` |boolean|True|Specifies if the order leg is a buy or sell|