set term pngcairo size 1024, 800 set xdata time set timefmt "%Y-%m-%d" set format x '%Y/%m' plot 'pm-xp.txt' using 2:4 with lines title 'XP',\ '' using 2:($1*1000) with lines title 'Level',\ 'wayback.txt' using 1:2 with lines title 'Wayback Machine'