You get gold graphs if you have Truesight from DotaBuff Plus.
This is because the Dota API only exposes XP information and not gold info. They have to get the gold graphs from the replay, which is restricted to DB Plus users.
კომენტარის დასაწერად გაიარეთ ავტორიზაცია.
I mean dotabuff already shows xp graph, why not gold graph?