DUCT 

The indicator plots a channel based on fractals.

Description of the indicator settings:

• Time_Frame — period of the chart for finding the fractals and the points of control of the channel. At = 0 means the current chart, on which the MQL4 program is running.
• Needed_Bars — The number of bars in history for the indicator calculation, at = 0 all bars are calculated.
• Clamping_Bars — limit of the number of bars for the search of fractals, at = 0 calculated automatically.
• Koeff_Flat — The coefficient to determine the flat.
• collir — the colour of the indicator lines.