# indie:lang_version = 5
# education purpose
# © 2025 Pavel Medd (@pavelmedd)
# Licensed under the MIT License. You may use, copy, modify, merge, publish, 
# distribute, sublicense, and/or sell copies of the Software, subject to the 
# conditions of the MIT license. Full license text: https://opensource.org/licenses/MIT

from indie import indicator, plot, color, MutSeriesF
from indie.algorithms import Sum

@indicator('DeMarker')
@plot.line(color=color.BLUE, id='#plot_0')
def Main(self):
    period = 14  # DeMarker's standard period

    # Create a series to store the differences
    high_diff = MutSeriesF.new(0)
    low_diff = MutSeriesF.new(0)

    # Fill the series with values
    if self.high[0] > self.high[1]:
        high_diff[0] = self.high[0] - self.high[1]
    if self.low[0] < self.low[1]:
        low_diff[0] = self.low[1] - self.low[0]

    # Use Sum to sum over the period
    sum_high = Sum.new(high_diff, period)[0]
    sum_low = Sum.new(low_diff, period)[0]

    # Calculate DeMarker
    dem = sum_high / (sum_high + sum_low) if (sum_high + sum_low) != 0 else 0

    return plot.Line(dem)