Custom EMA Crossover

First off, an Exponential Moving Average (EMA) is a moving average indicator that gives
more weight to recent price data, making it highly responsive to changes in the market.
The 9 EMA calculates explicitly the average of the last nine closing prices, giving you a
line on your chart that tracks the recent price trend with greater sensitivity. With it, you
can catch a short-term trend direction or even other minor trends during a major trend.
On a price chart, the 9 EMA is displayed as a single line that oscillates above and below
the asset’s price action.
Generally, the 9 EMA has a huge body of followership among many moving average
traders and day traders. This is because it offers the perfect balance between the past
and the present. Since it takes 9 periods into consideration