Right now, I am in gold V with zero LP. If I haven't received the warning that I have low MMR, is there a chance I will be demoted? I read on League wiki that if you are at risk of being demoted, you will get a message saying that you might be demoted because of low MMR.
There is no warning. If you're at 0 LP, you're at risk of being demoted.
It depends on your MMR. If you're constantly playing with Silvers, then yes you probably can get demoted. If your MMR is high, pure Gold games, then you probably will have a much harder time getting demoted.
Your MMR has to drop like 2 tiers (Silver II) to get demoted out of Gold V. If you are in division 5 of a tier and your MMR drops an entire tier, you will be warned about possible demotion. And then when it drops another tier, you will be demoted.
