INNER CODE UNIT · Python

_backfill_ticks_if_stale

aaryansinha16/AI-trader · backend/app.py:601

def _backfill_ticks_if_stale():
    """
    During market hours, scan today's NIFTY-I tick coverage for gaps and
    fill each one via TrueData REST `getticks`. Idempotent: deletes the
    affected window first to dedupe with anything the websocket has
    streamed in parallel.

    Why mirror this from the candle backfill rather than relying on the
    websocket alone:
      • TrueData WebSocket drops several times per session (Connection
        timed out → 5-15 minute reconnect gap), and on 2026-04-08 produced
        long sparse intervals in the live tick chart.
      • REST `getticks` covers the last 5 days at full bid/ask/OI fidelity,
        so any gap inside the 5-day window can be silently patched.
      • EOD scripts also patch gaps, but waiting until 16:00 means the
        scoring loop and the live chart see incomplete data all day.

    Throttled to once per minute (the scanner runs every 30s) — gaps don't

View source record →