ModifyGttOrder

Modify an active GTT trigger. The body is a full replacement of the trigger spec: the same shape as PlaceGTTOrder plus trigger_id. The broker's underlying PUT replaces trigger prices, leg limits, and order params atomically.

Send everything you want to keep. Modify is not a patch: fields you omit are not preserved.

SINGLE vs OCO: Same Trigger Type as Original

You can modify any of the price levels, the quantity, or the pricetype, but you cannot switch a SINGLE into an OCO (or vice versa). If you need that, cancel and re-place.

Type	Use when…	Triggers	Orders fired
SINGLE	You set up one entry/exit at a level.	1	1
OCO (One-Cancels-Other)	You set up a stoploss + target bracket.	2	1 of 2 (the other is auto-cancelled)

In SINGLE there is no second leg and no automatic cancel: once your one trigger fires and the order is placed, the GTT is finished.

How to Choose triggerprice_sl vs triggerprice_tg (SINGLE only)

For SINGLE, exactly one of these two fields is your trigger price; set the other to 0. Pick based on where your trigger sits relative to LTP:

Field	Trigger sits…	Typical intent
triggerprice_sl	below current LTP	SELL stop-loss · BUY-on-dip · BUY-the-fall
triggerprice_tg	above current LTP	BUY breakout · SELL-at-target · SELL-the-rise

For OCO, you always send both: triggerprice_sl (the lower trigger, your stoploss) and triggerprice_tg (the higher trigger, your target).

Note on naming. In SINGLE, triggerprice_sl / triggerprice_tg are just the trigger price, the generic "price at which the order is triggered". The _sl / _tg suffix is only a directional hint (sits below / above LTP); SINGLE has no stoploss leg. In OCO, the suffix becomes a real role: triggerprice_sl is the stoploss-leg trigger and triggerprice_tg is the target-leg trigger.

Endpoint URL

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

Sample API Request (SINGLE): "Move my IDEA dip-buy from 9.55 to 9.65, raise limit to 9.60"

{
  "apikey": "<your_app_apikey>",
  "strategy": "My GTT Strategy",
  "trigger_id": "23132604291205",
  "trigger_type": "SINGLE",
  "exchange": "NSE",
  "symbol": "IDEA",
  "action": "BUY",
  "product": "CNC",
  "quantity": 1,
  "pricetype": "LIMIT",
  "price": 9.60,
  "triggerprice_sl": 9.65,
  "triggerprice_tg": 0,
  "stoploss": null,
  "target": null
}

LTP is currently above 9.65 → trigger sits below LTP → use triggerprice_sl.

Sample cURL Request

curl -X POST http://127.0.0.1:5000/api/v1/modifygttorder \
  -H 'Content-Type: application/json' \
  -d '{
  "apikey": "<your_app_apikey>",
  "strategy": "My GTT Strategy",
  "trigger_id": "23132604291205",
  "trigger_type": "SINGLE",
  "exchange": "NSE",
  "symbol": "IDEA",
  "action": "BUY",
  "product": "CNC",
  "quantity": 1,
  "pricetype": "LIMIT",
  "price": 9.60,
  "triggerprice_sl": 9.65,
  "triggerprice_tg": 0,
  "stoploss": null,
  "target": null
}'

Sample API Response

{
  "status": "success",
  "trigger_id": "23132604291205"
}

Sample API Request (OCO): "Tighten my INFY bracket, stop 1480 to 1485, target 1620 to 1625"

{
  "apikey": "<your_app_apikey>",
  "strategy": "Bracket OCO",
  "trigger_id": "23132604291213",
  "trigger_type": "OCO",
  "exchange": "NSE",
  "symbol": "INFY",
  "action": "SELL",
  "product": "CNC",
  "quantity": 5,
  "pricetype": "LIMIT",
  "price": 0,
  "triggerprice_sl": 1485,
  "stoploss": 1483,
  "triggerprice_tg": 1625,
  "target": 1627
}

price=0 because OCO uses per-leg limit prices: stoploss (the SL leg's limit) and target (the target leg's limit).

Parameters Description

Parameters	Description	Mandatory/Optional	Default Value
apikey	OpenAlgo API key (string)	Mandatory	-
strategy	Strategy identifier (string)	Mandatory	-
trigger_id	The trigger ID returned by PlaceGTTOrder. Identifies which active GTT to modify (string)	Mandatory	-
trigger_type	SINGLE or OCO. Must match the original trigger's type (string)	Mandatory	-
exchange	Any value in the shared VALID_EXCHANGES list (string)	Mandatory	-
symbol	Trading symbol in OpenAlgo format (string)	Mandatory	-
action	BUY or SELL (string). For OCO, applies to both legs.	Mandatory	-
product	CNC (equity delivery) or NRML (F&O overnight). MIS is not supported for GTT. (string)	Mandatory	-
quantity	New order quantity. Integer for equity/F&O; fractional float allowed for crypto (number).	Mandatory	-
pricetype	LIMIT or MARKET (string)	Optional	LIMIT
price	SINGLE only. New limit price of the child order. Send 0 when pricetype=MARKET. Ignored for OCO. (float)	Mandatory	-
triggerprice_sl	New trigger price below LTP. SINGLE: use this OR triggerprice_tg. OCO: required (the stoploss-leg trigger). (float)	Conditional	0
triggerprice_tg	New trigger price above LTP. SINGLE: use this OR triggerprice_sl. OCO: required (the target-leg trigger). (float)	Conditional	0
stoploss	OCO only. New limit price for the stoploss leg's child order. Ignored for SINGLE. (float, null, or "")	Conditional	null
target	OCO only. New limit price for the target leg's child order. Ignored for SINGLE. (float, null, or "")	Conditional	null

ModifyGTTOrderSchema has no expires_at field: expiry cannot be changed on an existing trigger. Like the place schema it sets unknown = EXCLUDE, so unrecognized fields are dropped rather than rejected, and dropped fields never reach the broker.

Trigger Field Rules

trigger_type	What you must send	Constraint
SINGLE	exactly one of triggerprice_sl / triggerprice_tg (>0); the other = 0	price is the child order's limit; send 0 for MARKET.
OCO	all four: triggerprice_sl, stoploss, triggerprice_tg, target (all >0)	triggerprice_sl < triggerprice_tg. Both legs share action, quantity, product.

Response Fields

Field	Type	Description
status	string	"success" or "error"
trigger_id	string	Modified trigger ID (same value you sent)
message	string	Error message (on failure)

What Can Be Modified?

Parameter	Modifiable	Notes
Trigger prices (triggerprice_sl / triggerprice_tg)	Yes	For OCO, both legs swap atomically.
Limit prices (price / stoploss / target)	Yes
quantity	Yes	Must be a valid lot size for F&O.
pricetype	Yes	LIMIT ↔ MARKET (see broker-specific notes below).
trigger_type	No	Cannot switch SINGLE to OCO or back. Cancel and re-place.
symbol / exchange	No	Cannot change instrument.
action	No	Cannot change BUY ↔ SELL.

Notes

• Numeric fields (quantity, price, triggerprice_sl, triggerprice_tg, stoploss, target) are JSON floats. Empty strings ("") for stoploss/target/triggerprice_sl/triggerprice_tg are also accepted and coerced to null/0.

• Modify is a full replacement: every field on the trigger is replaced. Always send all fields you want to keep, not just the diff.

• Only active GTTs can be modified. Triggered, cancelled, or expired GTTs are immutable.

• last_price is fetched server-side from the broker's quotes endpoint. You don't need to send it.

• OCO modify atomicity: OpenAlgo aims to update both legs of an OCO atomically; some brokers expose a per-leg modify under the hood and may, in rare failure cases, leave the OCO in a half-modified state. Re-issue the modify, or cancel and re-place, if the response indicates partial failure.

• MARKET handling: same auto-conversion behaviour as PlaceGTTOrder; broker-specific quirks are absorbed in the broker layer.

• Semi-auto mode blocks GTT modify (parity with ModifyOrder). Switch to Auto mode if you see a 403.

Error Scenarios

Error	Cause
trigger_id is required (400)	Missing trigger_id
Modify GTT order is not allowed in Semi-Auto mode (403)	User in Semi-Auto mode
triggerprice_sl: Stoploss trigger must be less than target trigger	OCO with triggerprice_sl >= triggerprice_tg
GTT supports only CNC (delivery) or NRML (overnight F&O); MIS is intraday-only.	product=MIS submitted
Failed to fetch last_price from broker quotes (502)	Broker quotes endpoint unavailable
Sandbox GTT support not yet implemented (501)	Analyzer mode is enabled
GTT orders are not supported for broker 'X' yet (501)	Broker capability gate

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