As someone said before,
Indicators on your car are for you to say the fellow road users of your intentions. Not to tell others what to do.
So if you want the car behind you to overtake you, just dont do anything. He will overtake you nevertheless, if hez faster than you. If you are hell bent on letting him know that you want him to overtake you, just turn on the left indicator. Atleast it will mean that you'll go left and the right lane is free for him.
Never do a right indicator for people behind you to overtake. It'll end up in a massive confusion.
Also, why hazard lights when driving? Just cant get the logic behind it. In low visibility, its more confusing as you are caught in two minds as in whether the car is stationary or moving.
Please stop these practices.