Sometimes, when a long term EMA is in proximity to a short term EMA, it is known to be some of the most important confluences for long term swing traders, known as the "Golden" and "Death" Crosses. Sometimes, the market makers like to take advantage of traders looking for this confluence. This is what causes expansive volatility within these ranges. It can also be noted that the areas where the EMA thenselves crossed can be massively strong levels price will be attracted to later, as well as often important fibonacci confluence.