System overview

Revolut FIX Gateway is a FIX 4.4-compliant gateway that provides a direct connectivity to the Revolut matching engine cluster.

Each FIX API (Trading and Market Data) is served by its respective Revolut FIX Gateway.

Revolut FIX Gateway operates in the UTC time zone.

For more information about FIX, see the FIX protocol documentation.

Supported FIX messages​

Session-level messages​

These messages are the same for both the Trading FIX API and Market Data API.

Application-level messages​

FIX Gateway rate limiter​

Once the rate limiter counter reaches the defined value (currently 7500 orders in the 5-second sliding window), FIX Gateway will start sending rejection for NEW (D New Order - Single) and REPLACE (G Order Cancel/Replace Request) orders, until the number of recently posted orders reduces below the threshold:

• For a NEW order that violates the rate limiter, FIX Gateway will reply with 8 (ExecutionReport):

  Tag	Name	Value
  103	OrdRejReason	99 - Other
  58	Text	Rate limit exceeded

• For a REPLACE order that violates the rate limiter, FIX Gateway will reply with 9 (OrderCancelReject):

  Tag	Name	Value
  102	CxlRejReason	99 - Other
  58	Text	Rate limit exceeded

The impact of NEW and REPLACE is the same (weight=1). There is no rate limiter for CANCEL (F Order Cancel Request) requests (weight=0).

The expected behavior is to tolerate such rejections, wait (for example, ~1 second) and re-send the ORDER/REPLACE request, with more recent price if necessary.