Coding, Algos in Pi

Algos, strategies, code
1

Could some one inform me how to create code for the below:

Buy Alert: The candle closes above 8 days Exponential Moving Average
Sell Alert: The candle closes below 8 days Exponential Moving Average

2

Could some one inform me how to create code in Pi platform for the below:

Buy Alert: The candle closes above 8 days Exponential Moving Average
Sell Alert: The candle closes below 8 days Exponential Moving Average