Same question i made to raptor.
This is how i do RDL
So, wider than shoulder width grip, they have these markings, which i place my hand over and pick up the bar with the weight on my fingers and not on my upper palm, i will get to that later, then squeeze glutes, bend the knees a little so bar is at crease of hip, then concentrating on hip moving back, while looking forward at my reflection, to keep my chest up, not too up, as far back as my hip is mobile enough to go, when i feel tension in the glutes/hip area, then come up by driving the hip into the bar, but try keep knees still bent a little as done in start position. That's it, when finished then you can straighten you knees, place bar down.
now regarding my grip, i can see that if i start getting heavier, the bar will start to slip from my hands, so i have held the bar so i am holding the bar on the fingers rather than it being placed over my knuckles.
let me try draw it in paint.
As that helps with carrying more load, even though when i get to around 9-10 reps i forearm pain like crazy.
so what do you think.