It looks like they are using google finance or something.
Thanks for sharing your link and info! Appreciated
Actually that graphic is wrong, Bitcoin is around 38,000,000 pesos here now, and that's ATH. You can check the bitcoin value in pesos on this site: https://criptoya.com
Discussion
Google use the “official” dollar value, that value doesn’t exist, because only few persons can buy just $200 per month in the bank, due to restrictions, and you have to add taxes to that value (75%) so people use the black market value (aka Blue dollar), and that’s the real dollar value in the streets.
Official dollar: 365.50 pesos
Blue dollar: 1,200 pesos