OLL 8
The algorithm, how to recognise it and how to practise it without cheating.
Recommended algorithm
l' U' L U' L' U2 l7 moves · with the left hand
Alternatives
(U2) r' U' R U' R' U2 r7 moves
How to recognise it
A small lightning bolt: the back and right edges with the front-right corner. The front-left corner's yellow faces you.
Its inverse is another case
Do the 8 algorithm backwards, l' U2 L U L' U l, and you are solving 5.
That's why CubeDojo never scrambles 8 that way: it builds a random state with the case fixed, so you practise 8 and not 5.
Practise 8 now
Random-state scrambles, a timer and spaced review. Free, on the web and on your phone.