A robot that trades base on an indicator

I want a robot that uses the ideas of a pine script indicator which I will upload the code. The robot should buy when the arrow of the indicator indicates a buy signal and closes with a bullish candle immediately after the signal. It should keep buying and adding positions if a new candle opens and closes as bullish.If the candle opens and closes as bearish when it's on a buy trade ,it should not open another buy trade. As soon as another bullish opens and close appears, it should open another buy trade. All positions are close  as soon as the next arrow for a buy appears on the indicator and take profit. The stop loss should be automatically calculated above a certain range.     The robot should sell as soon as the sell arrow shows and the candle closes as bearish. It should keep selling as more bearish candle opens and closes. If a bullish candle opens during sell, it should not open another position until a new bearish candle appears and continue selling until the next buy arrow where all positions are close.  It should not open a trade if the spread is bigger than a certain amount of pips which I will be able to set in the EA. Stop-loss should be magic stop loss should be automatically set by EA