Macd crossover above and below zero line afl

#1
Hai Seniors and experts
Can any coder help to make AFL in which --
when MACD signal line crosses zero line from below it turns into bright green
and also a up bright green arrow is shown as buy signal .

Similarly when MACD signal line crosses zero line from above it turns in to red and also a down red arrow is shown as sell signal .
That will be a great help .
thanks a lot in advance.
 

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