I'd also like to add an "IRL" example. Oanda was offering >40D touches priced as digitals. In 2011 the mkt in a 40-pip OTM bear-strike TOUCH on EURUSD was 75/100 BUYS at ONE MONTH in duration. These were not classified as touches (they were box options) but were structured as either fwd-starts (permutations thereof), digitals or touch markets, depending on how they were structured in 2D. I have some screengrabs somewhere on dropbox, but I PMed mav here on ET (he can corroborate) with actual R/T examples that I'd traded.
So the empirical difference between a digital and a touch = Oanda's blowout and leaving the space. Even when pricing was a few bp off theo, it was a fantastic mkt to trade. Endless possibilities on FX option structuring.
FWIW, I've got a EURUSD DNT going off tomorrow at 5PM ET. 1.3434x1.3626 does not touch from 73K/100K Euro OPM. Done this morning.
So the empirical difference between a digital and a touch = Oanda's blowout and leaving the space. Even when pricing was a few bp off theo, it was a fantastic mkt to trade. Endless possibilities on FX option structuring.
FWIW, I've got a EURUSD DNT going off tomorrow at 5PM ET. 1.3434x1.3626 does not touch from 73K/100K Euro OPM. Done this morning.

