Kotak Neo: Trading chart shows "History contains an invalid candle" on NSE_INDEX 30m

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Environment

• OpenAlgo: v2.0.2.5
• Broker: Kotak Neo
• Instrument: NIFTY
• Exchange: NSE_INDEX
• Timeframe: 30m
• Date observed: 21-Sep-2026
• Market mode: Live Mode

Problem

The Trading tab loads the chart but shows:

History error: History contains an invalid candle

The chart does not transition correctly into live market-data updates.

Important finding

The REST history API itself returns status: success and valid-looking OHLC data.

Example request:

{
  "symbol": "NIFTY",
  "exchange": "NSE_INDEX",
  "interval": "30m",
  "start_date": "2026-09-18",
  "end_date": "2026-09-21"
}