When do you know your elo?
I don't mean how do you figure out your hidden MMR or anything like that. I literally mean how do you know when you have hit your skill cap and just can't push any higher. It's unfortunate, but some people will never see diamond because their skills just can't improve any further. I've been having some trouble climbing out of Gold 5, but I think I can attribute it to mitigating factors and my own impatience. So I'm trying to find out if I can indeed go higher with enough patience, or if gold is where I belong. Which is fine.
I've heard that the amount of LP you gain and lose after ranked games is a good indicator. For instance, mine is around 16 LP lost after a defeat, and between 21 and 24 gained on a victory.