FRED enables combining (and tweaking/scaling/etc) charts pretty easily on their site. Check out the 'edit graph' button. You can use the ID's of the individual

FRED enables combining (and tweaking/scaling/etc) charts pretty easily on their site. Check out the 'edit graph' button. You can use the ID's of the individual charts (like IHLIDXUSTPSOFTDEVE) when searching for a table to add. Here are those 4 tables combined: https://fred.stlouisfed.org/graph/?g=1EDHP https://fred.stlouisfed.org/graph/?g=1EDHP