hayeksbane

I am a complete newbie to this game and would like to ask-can anyone tell me why IG nat gas price tallies with other cfd providers at rollover and then does not track the spot price? The current IG price is 2488 and the current spot price is 1988. At rollover 23/08/2020 it aligned, give or take a few points and then progressively went to 50 points above, 100 points above, 150 points abopve, 200 points above and so on until we are now 500 points above spot price i am confused and really should not be considering i am trading it. feels like a stupid question with a simple answer but i really would like to know rather than keep silent. i have used the IG charts to chart what i think is going to work for me and made the mistake of having an IG account and another providers account and then using the excellent IG charts to trade on that other platform. i am trying to understand why the difference so that i can understand better going forward.