# Order Processing and Trading

- [Place Order](/api-documentation/orders/place-order.md): Place a new order
- [Syntax](/api-documentation/orders/place-order/orders_placeorder.md)
- [Verify Order Placement](/api-documentation/orders/validate-order-placement.md): Verify a new order before placing it
- [Syntax](/api-documentation/orders/validate-order-placement/orders_previewcreateorder.md)
- [Verify Order Replacement](/api-documentation/orders/validate-order-replacement.md): Verify an order modification before committing changes
- [Syntax](/api-documentation/orders/validate-order-replacement/orders_previewmodifyorder.md)
- [Replace Order](/api-documentation/orders/replace-order.md): Modify an existing order (cancel and replace)
- [Syntax](/api-documentation/orders/replace-order/orders_replaceorder.md)
- [Cancel an Order](/api-documentation/orders/cancel-order.md): Cancel an existing outstanding order
- [Syntax](/api-documentation/orders/cancel-order/orders_cancelorder.md)
- [Get Order's Info](/api-documentation/orders/get-orders-info.md): Retrieve information about a particular order
- [Syntax](/api-documentation/orders/get-orders-info/orders_getorder.md)
- [Get Filtered Orders](/api-documentation/orders/get-filtered-orders.md): List a user's outstanding and executed orders
- [Syntax](/api-documentation/orders/get-filtered-orders/orders_getorders.md)
- [Validate Order by ID](/api-documentation/orders/validate-order-by-id.md): Validate an existing order by providing its ID
- [Positions](/api-documentation/orders/positions.md): Fetch information on a user's current positions
- [Get User's Positions](/api-documentation/orders/positions/get-users-positions.md): List all existing positions of a user
- [Syntax](/api-documentation/orders/positions/get-users-positions/positions_getpositions.md)
- [Get User's Positions in a Security](/api-documentation/orders/positions/get-users-positions-in-security.md): List all user's positions in a particular security
- [Syntax](/api-documentation/orders/positions/get-users-positions-in-security/positions_getpositionbysymbol.md)
- [Get Market Value of all Security Groups](/api-documentation/orders/positions/get-market-value-of-all-security-types.md): Retrieve a trading account's collective market value of all security groups
- [Managing Transactions](/api-documentation/orders/managing-transactions.md): List transactions
- [Get Transactions](/api-documentation/orders/managing-transactions/get-transactions.md): List transactions of a particular user
- [Syntax](/api-documentation/orders/managing-transactions/get-transactions/transactions_getactionspage.md)