The Quote <S> message is used as the response to a Quote Request <R> message and can be used to publish unsolicited quotes.
Quotes supplied as the result of a Quote Request <R> message are tagged with the appropriate QuoteReqID <131>, unsolicited quotes can be identified by the absence of a QuoteReqID <131>.
The symbol used for forex quotes is, in ISO codes, "currency1.currency2" (e.g. GBP.USD) and the quote will be returned as
a rate expressed as currency1/currency2. BidPx <132> indicates the rate at which the broker is willing to buy currency1 and deliver currency2, OfferPx <133> indicates the rate at which the broker is willing to sell currency1 and receive currency2. Indicative rates are quoted in
the BidPx <132> field and may contain a level in the BidSize <134> field.
Orders can be generated based on Quotes, quoted orders include the QuoteID <117> and are OrdType <40>=Quoted Order.