Today I saved an ignorant driver and occupents of a three wheeler by indicating left signal to a Civic trying to overtake me from my left hand side. Three wheeler was coming ahead of me trying to turn to his right crossing the road ahead of me. Civic from my behind had no clue of the three wheeler, neither did the three wheeler guy of the civic. Having seen my left signal blinking, civic realised he should slow down which eventully saved the three wheeler.
Not sure if indication of this nature complies with the code but it surely saved some lives in this case.