I want to merge my two custom indicators I have into one indicator

I have two custom indicators coded using EMA that draw two lines (channel) on my chart and gives buy signal Arrow when candle closes above the two lines and Sell signal Arrow when candle closes below the two lines.

I used to manually drop the indicator on the chart to change its input parameters to form upper and lower lines including the third line but I want it to be able to form the three lines with specific settings without manually inputting the parameters each time I drop it on the chart.