ref: 8d3b580ab315f529d757810cea3d2de3faad8076
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; };