Strategy Startup Guardrails

Quick Checklist (before launch)

• •Imports: avoid shadowing time; use from datetime import time as dt_time and import time as time_module for timestamps.
• •Market hours helpers: call dt_time(...), not time(...) if time is a module.
• •Config/env: confirm OPENALGO_APIKEY, broker creds, and host/port.
• •Data readiness: master contracts downloaded for required exchanges/symbols.
• •History preflight: run one manual history request with real payload (see history-payload-validator).

Fast Triage Steps

1. •Read the latest strategy log for the traceback.
2. •If TypeError: 'module' object is not callable, search for time( with a module import:
   bash

   rg "import time" openalgo/strategies | head
   rg "time\\(" openalgo/strategies/scripts
   

   Ensure you call dt_time(...) for market hours and time_module.time() for timestamps.
3. •If crash happens before first request, check missing env vars or config JSON.
4. •If crash is on history fetch, switch to history-payload-validator.
5. •Restart only after the above checks pass.

Safe Patterns

• •Import pattern:
  python

  from datetime import time as dt_time
  import time as time_module
  # use dt_time(9, 15); use time_module.time()
  

• •Guard market hours:
  python

  if not is_market_open():
      logger.info("Market closed; exiting")
      return
  

• •Validate dependencies at start: raise clear errors if env/config is missing.

Post-Fix Verification

• •Rerun the strategy and ensure logs show:
  • •Startup banner
  • •Successful history fetch
  • •No immediate traceback within the first minute
• •Keep tailing logs for 2–3 minutes after restart to confirm stability.