If you talk about Chelsea is really hard to say if they'd win or not and same goes to Fulham but the main focus should be on Chelsea because they're the bigger boys but these days is like they should be classified as smaller team base on performance.
This season is very hard for the Blues to even get a draw talkless of a win, I'd say Fulham are going to do anything possible to get a win that's if Pochettino decide to do some wrong selection.
It is true that currently Chelsea is difficult to predict because their performance is very unstable, especially when playing away from home. However, when Chelsea is the host, Chelsea wins and draws more, which I don't think Chelsea will let Fulham win at Stamford Bridge.
And head to head both Chelsea teams are superior to Fulham and Chelsea won three wins, one draw and also one defeat against Fulham. And I think Pochettino will plan and give his best in front of his supporters and will field his best squad to win this match, even though every Chelsea match is always in doubt, but for this match I think they can win it.
True, it is quite difficult to predict the outcome of this match because as you said and maybe most of us already know that now Chelsea is in an unstable performance, sometimes winning against stronger teams and sometimes losing when faced with medium or far below them, there is no stagnant situation in their performance now so obviously that makes it quite difficult for us to be able to speculate on the final result of who will win in this match. On the other hand, recently we saw that Fulham won three full points in the match against Arsenal with a score of 2 - 1, if we look at a glance, of course Arsenal are a team that can always compete at the top of the standings with Manchester City, but on the other hand I don't really believe that Fulham are in very good form because the fact is that the victory is because Arsenal are also now in a problem of depth of performance so that before that they also lost to West Ham.
I'm pretty sure that in this match Chelsea have a better chance, they will play at home and we can see in the previous few matches they managed to hold a draw with a team like Manchester City when playing at home and that's exactly what you said. So maybe I will be in the Chelsea camp again this time, but let's just see the results later.