A long tale

 

Is there an expert programmer who can program a fairly simple indicator for me. Indicator will show candles with long tales.

It will, lets say, paint the candle red or draw an arrow if the candles tale is 50 % or more from the total length of the candle. It will do so after the candle is formed so to avoid repainting. Don't see how it can be hard to do. If anybody can either point me to the indicator if it exists or make one it would be great.