Please forgive me if I'm wrong. From my understanding DTK is the direct track from current position to next way point. So in EV4 522 I observed that DTK-M in info fields only changes when overflying a route WP whereas it's a fixed value while passing perpendicular. On attached screen shot DTK-M shoud indicate somewhat like 95° to Whiskey 1.
see http://www.aviationdictionary.org/DTK 😉
DTK=Desired Track, aka the track that should be flown according to the routeplanning. So this stays fixed for an entire leg and does not take the current actual plane position into account (not *entirely* true, DTK does change a little bit due to great circle navigation, but thats a different subject I propose).
What you are looking for is Bearing (BRG).