Do not change your lane position until you're sure that the driver has made room for you. If you have an H2, H3, GXR or FAV ( NB: fighting armored vehicle), do it. Mafee mushkeela. Most drivers will, but there's no guarantee. Your ROLEX - signal doesn't make it safe to change lane position. Only the driver's response to your signal makes you safe.Usually the response is: “&*$^#@$%*^&*^*&%&$^%#$^%*&^*”in Arabic.
But you cant speak Arabic. Then, do it!
If you begin your lane change early enough to deal with two drivers ( 100 QR each), you'll almost always succeed; if the first driver doesn't make room for you, the second one almost certainly will ignore you. So anticipate turns and plan for them in time.
In high-speed highway traffic, drivers may not have time to react to you. Then you need to wait for a gap in the traffic .You can rent a room to the nearest hotel.

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No one lady is ugly, the drink it's not enough!"