Thanks. 
Does 'value' mean 'trust score'? 

Coinsreporter

i am likewise curious how trust gets calculated on stacker news, this is very interesting. is there a post about such an algo? i don't mean to game it, like some, only to understand the attack vectors (of course, that's what a gamer wud also say). 

SHA256man

I don't know the mathematical formula either, but I do know that to gain trust rank you have to receive zaps, preferably high ones, from stackers with high trust rank. zapping hard top posts and comments too.