On a trading desk, requests for quote won divided by requests received, per client and product over a window. The desk's version of share of wallet, counted in requests.
Hit ratio = RFQs won ÷ RFQs received
Declined requests count as received and not won. Otherwise the ratio measures only the requests the desk chose to compete on.
A high hit ratio on a small share of the client's flow means the client sends you the trades they intend to do with you. A low hit ratio on a large request count means you are the price check. Neither number alone says which.
Hit ratio falling while requests hold: the client is testing another dealer. Requests falling while hit ratio holds: a product has moved. Hit ratio rising while volume falls: you are winning the small tickets.
Requests for quote traded divided by requests received, per client, product and channel, by count and by notional.
A client sent forty inquiries and traded eighteen: 45 percent by count. By notional it traded $32 million of $400 million: 8 percent. It trades size elsewhere.
Voice and electronic blended, and count used without size. The price-checker ranks as the best client.