Retrieve historical price series for an NGX-listed company.
Pass your API key as a Bearer token: Authorization: Bearer ngm_live_YOUR_KEY.
Generate keys at ngnmarket.com/dashboard/developer.
NGX ticker symbol (e.g. DANGCEM). Case-insensitive.
"DANGCEM"
Response shape for data points.
detailed (default) — objects with timestamp, date, price, source.chart — compact [timestamp, price] arrays.detailed, chart