OTTO protocol

OTTO, which is based on the same technology as the OUCH protocol, works by passing logical messages between the host and the client application. Inbound messages are processed in the order received. Each new order contains a token specifying the date and the name of the account. Once a token has been used, it automatically expires so it cannot be used again. When an order has been placed, executed or canceled and the action has been accepted by the host, an acknowledgment message is sent to the customer.

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More resources from around the web: - NASDAQ Trader provides an overview of the OTTO protocol.

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