[BOUNTY] strategy on 4ema

[lucag74]

Hi, 
my first post here, i'm a newbie in gekko strategy.
What i need , also paying it's a people help me to develop my strategy,

First signal to buy :
Name: 4ema
We analyze 4 Ema, 

for example

Blue Ema : 8 (very short)
Green Ema : 13 (short)
Yellow EMA : 20 (medium)
Red EMA : 30 (long)

Of course the time of for ema must can  be set as parameters.

Buy signal : upward trend
Blue Ema > Green Ema > Yellow Ema > Red Ema

Sell signal :
When there is no more buy signal

You can see the indicator on tradingview is called 4ema.

This strategy must be implemented in future with other indicator like RSI.

And last question, gekko can be make short sell ? I intend short sell , selling borrowed crypto to buy back then.

Thank's