Retracement Indicator MQL5

I need an indicator witch is creating an notifcation when the the following appears. 

Retracement Signal 

Sell: 

-12 EMA < 36 EMA (adaptable)  (This should be always the case for every signal)

-(3) or more candles closed bullish (number should be adaptable) 

-If the (third) the bullish candles closes a signal should be triggered

Alert message  body EURAUD 15M: Retracement for SELL is detected. (This means currency pair, timeframe, Message)

Buy: 

-12 EMA > 36 EMA (adaptable) (This should be always the case for every signal)

-(3) or more candles  closed bearish (number should be adaptable) 

-If the (third) the bearish candles closes a signal should be triggered

Alert message body EURAUD 15M: Retracement for BUY is detected. (This means currency pair, timeframe, Message)

The alerts should be stored in the expert folder. 

Example