ModifyOrder

Modify an existing open order. You can change price, quantity, trigger price, and other parameters.

Endpoint URL

Local Host   :  POST http://127.0.0.1:5000/api/v1/modifyorder
Ngrok Domain :  POST https://<your-ngrok-domain>.ngrok-free.app/api/v1/modifyorder
Custom Domain:  POST https://<your-custom-domain>/api/v1/modifyorder

Sample API Request

{
  "apikey": "<your_app_apikey>",
  "orderid": "250408001002736",
  "strategy": "Python",
  "symbol": "YESBANK",
  "action": "BUY",
  "exchange": "NSE",
  "pricetype": "LIMIT",
  "product": "CNC",
  "quantity": 1,
  "price": 16.5,
  "trigger_price": 0,
  "disclosed_quantity": 0
}

Sample cURL Request

curl -X POST http://127.0.0.1:5000/api/v1/modifyorder \
  -H 'Content-Type: application/json' \
  -d '{
  "apikey": "<your_app_apikey>",
  "orderid": "250408001002736",
  "strategy": "Python",
  "symbol": "YESBANK",
  "action": "BUY",
  "exchange": "NSE",
  "pricetype": "LIMIT",
  "product": "CNC",
  "quantity": 1,
  "price": 16.5,
  "trigger_price": 0,
  "disclosed_quantity": 0
}'

Sample API Response

{
  "orderid": "250408001002736",
  "status": "success"
}

Request Body

Parameter	Description	Mandatory/Optional	Default Value
apikey	Your OpenAlgo API key	Mandatory	-
orderid	Order ID to modify	Mandatory	-
strategy	Strategy identifier	Mandatory	-
symbol	Trading symbol	Mandatory	-
action	Order action: BUY or SELL	Mandatory	-
exchange	Any value in the shared VALID_EXCHANGES list	Mandatory	-
pricetype	Price type: MARKET, LIMIT, SL, SL-M	Mandatory	-
product	Product type: MIS, CNC, NRML	Mandatory	-
quantity	New order quantity	Mandatory	-
price	New order price	Mandatory	-
trigger_price	New trigger price; send 0 when unused	Mandatory	-
disclosed_quantity	New disclosed quantity; send 0 when unused	Mandatory	-

All twelve fields are required by ModifyOrderSchema, with no defaults, and any other field returns HTTP 400. There is no partial modify: build the full body from the order's current values and change only what you need.

Response Fields

Field	Type	Description
status	string	"success" or "error"
orderid	string	Modified order ID
message	string	Error message (on failure)
mode	string	"analyze" in analyzer mode. The key is absent in live mode; there is no "mode": "live"

What Can Be Modified?

Parameter	Modifiable	Notes
Quantity	Yes	Must be valid lot size for F&O
Price	Yes	For LIMIT/SL orders
Trigger Price	Yes	For SL/SL-M orders
Price Type	Varies	Depends on broker support
Product	No	Cannot change MIS to CNC etc.
Symbol	No	Cannot change symbol
Action	No	Cannot change BUY to SELL

Notes

• Only open/pending orders can be modified

• Completed, cancelled, or rejected orders cannot be modified

• Some brokers may have restrictions on modification frequency

• The order must be in a modifiable state (not in transit)

• If you need to change action (BUY/SELL), cancel and place a new order

• For F&O orders, ensure the modified quantity is a valid lot size

• Fractional quantities are accepted only for CRYPTO; non-crypto quantities must be whole numbers.

• strategy, trigger_price, and disclosed_quantity are schema-required even when the broker does not use their values for the requested modification.

Error Scenarios

Error	Cause
Order not found	Invalid order ID
Order not modifiable	Order already executed/cancelled
Invalid price	Price out of circuit limits
Invalid quantity	Not a valid lot size for F&O

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