ref: bcd9cd180c7b4322919c5e07f7a398d65d97bb0e
dir: /a.h/
typedef struct Chart Chart; typedef struct Price Price; struct Price { Tm date; double open; double close; double high; double low; }; enum { Maxprices = 1024, }; struct Chart { Price prices[Maxprices]; usize nprices; double ymin; double ymax; };