Triple-Angle Trend Signal

An enhancement and iteration of lmatl's "angle bar colors [LM]" to enable multiple angle bars (up to 3) each with customisable price sources, angle periods, thresholds of degrees, line thicknesses and colours. Full history is displayed of when the selected angle bars have all been within higher degrees (green background) and lower degrees (red background).
This indicator is useful when it is customised to suit individual charts where it can specify conditions to find entries on uptrends and exits on downtrends.