# cTrader ProtoOAAccountDisconnectEvent Independent and unofficial. Not affiliated with or endorsed by any broker or platform named here. Educational only: nothing here is advice, and nothing here recommends a broker or a trade. This is the markdown version of https://openbrokerapi.com/platforms/ctrader/messages/protooaaccountdisconnectevent, written from the same records as that page. Risk warning: CFDs and spread bets are complex instruments and come with a high risk of losing money rapidly due to leverage. You can lose money on these products, and each provider publishes its own loss figure under FCA rules. You should consider whether you understand how they work and whether you can afford to take the high risk of losing your money. Automated and API trading can amplify losses through bugs, connectivity failures and runaway orders. Sent when the server drops the session of one trading account. The account has to be authorised again before it can be used. - Message: `ProtoOAAccountDisconnectEvent` - Interface: cTrader Open API - Group: Connection - Status: verified. Source: [help.ctrader.com](https://help.ctrader.com/open-api/messages/#protooaaccountdisconnectevent), checked 2026-10-12. - The definition file it was checked against: https://github.com/spotware/openapi-proto-messages/blob/main/OpenApiMessages.proto This is a message of the cTrader Open API, not an HTTP endpoint. It has no method and no path: it is sent over an open TCP or WebSocket connection, as Protocol Buffers or as JSON. It is in no OpenAPI file on this site and the request builder does not list it. ## The message - Name: `ProtoOAAccountDisconnectEvent` - Direction: Event, sent by the server - Payload type: `PROTO_OA_ACCOUNT_DISCONNECT_EVENT`, number `2164`. This number is what identifies the message on the wire. ## Fields - `payloadType` (type ProtoOAPayloadType, optional): Identifies the message. Its default in the definition is PROTO_OA_ACCOUNT_DISCONNECT_EVENT, which is number 2164. - `ctidTraderAccountId` (type int64, required): The account the message is about, by its cTrader account id. Responses and events carry the same id, which is how a program holding several accounts on one connection tells them apart. ## Limits that apply at cTrader Open API - Requests a second, not historical data: 50 requests per second - Scope: Per connection, requests that are not for historical data - Status: verified. Source: [help.ctrader.com](https://help.ctrader.com/open-api/), checked 2026-10-12. - Note: Historical data requests have their own lower limit, held in a separate record. - Requests a second, historical data: 5 requests per second - Scope: Per connection, historical data requests only - Status: verified. Source: [help.ctrader.com](https://help.ctrader.com/open-api/), checked 2026-10-12. ## Related cTrader messages: Connection - [ProtoHeartbeatEvent](https://openbrokerapi.com/platforms/ctrader/messages/protoheartbeatevent): A message with no content that shows the connection is alive. The server sends it when nothing else is being sent, and a client can send it to keep a connection open through a quiet spell of more than 30 seconds. - [ProtoOAAccountsTokenInvalidatedEvent](https://openbrokerapi.com/platforms/ctrader/messages/protooaaccountstokeninvalidatedevent): Sent when the server ends the session of particular trading accounts while the connection and its other account sessions carry on. The definition gives the causes: the account or the cTrader ID was deleted, or the token was refreshed or revoked. - [ProtoOAClientDisconnectEvent](https://openbrokerapi.com/platforms/ctrader/messages/protooaclientdisconnectevent): Sent when the server ends the connection with the application. Every trading account session on the connection ends with it. - [ProtoOAErrorRes](https://openbrokerapi.com/platforms/ctrader/messages/protooaerrorres): The general answer when a request fails. It names the error and can say when maintenance ends or how long a rate limited payload type stays blocked. - [ProtoOAVersionReq](https://openbrokerapi.com/platforms/ctrader/messages/protooaversionreq): Asks the server for its version, which the definition says can be used to check the current version of the Open API scheme. - [ProtoOAVersionRes](https://openbrokerapi.com/platforms/ctrader/messages/protooaversionres): Returns the version of the server application. ## More on cTrader - [All cTrader messages](https://openbrokerapi.com/platforms/ctrader/messages): 49 documented here, grouped by what they do. - [cTrader API quickstart](https://openbrokerapi.com/platforms/ctrader/quickstart) - [All cTrader error codes](https://openbrokerapi.com/errors/ctrader) - [cTrader API page](https://openbrokerapi.com/platforms/ctrader): The full record: access, authentication, limits and the source for each. ## Licence and how to cite The records behind this page are all rights reserved. This file is the page itself, at its own address, in another format. It is not part of the CC BY 4.0 downloads listed at https://openbrokerapi.com/data. Quote from it with a link to the page. Cite as: cTrader ProtoOAAccountDisconnectEvent. Broker API Hub, https://openbrokerapi.com/platforms/ctrader/messages/protooaaccountdisconnectevent, newest check 2026-10-12. Where you rely on a single figure, cite the source and the checked date printed beside it as well. Where this page and a broker's own documentation differ, the documentation wins.