I have never looked at moving averages, but see many people use it in their TA. My question is how can you use that when there seems to be so many different moving averages? Support and resistance levels I understand because it's clear on the chart. But with moving averages, I see people talk about 10 day MA, 12 day MA, 13 day MA, 20 day MA, 50 day MA, 200 day MA, etc. How can that work if everyone uses a different calculation?