Pinescript debug and modify -- 2

Need help with a existing pinescript for Tradingview these are required:-  1. Extend the plotted line to the max on the right 2. Labels at the right crossovers 3. Alerts when crossovers happen  4. Duplicate such arrays in the same indicator, to plot multiple lines 5. Input the above as options in setup 6. Minor Debugging as wrong values being plotted from Array.