fetchPcrIntraday abstract method

Future<String> fetchPcrIntraday()

Historical Put/Call OI ratio, pre-computed per strike range, so the Analysis screen's PCR tab can show its full session range immediately

JSON array, oldest first:

[
  {
    "time": 1721460600000,
    "price": 24230.5,
    "pcr": { "3": 0.42, "5": 0.51, "10": 0.63, "20": 0.7, "all": 0.75 }
  },
  ...
]

Return "[]" when no historical data is available.

Implementation

Future<String> fetchPcrIntraday();