XCCI_Candle_Vol indicator showing a breakthrough of its zero line using candles, color labels and audio signals.

input uint                SignTotal=3;              // Number of audio signals when a candle breaks through zero  input uint                SignalBar=1;              // bar number to receive the zero breakthrough signal  

The indicator uses SmoothAlgorithms.mqh library classes (copy it to <terminal_data_folder>\MQL5\Include). The use of the classes was thoroughly described in the article "Averaging Price Series for Intermediate Calculations Without Using Additional Buffers".

Fig. 1. XCCI_Candle_Vol_Zer