Local data files expected: /data/opcom-pip-history.json (built by npm run opcom:history -- --years 3) and /data/imbalance-history.json (built by npm run imbalance:history after collecting daily imbalance-YYYY-MM-DD.json).
/data/opcom-pip-history.json
npm run opcom:history -- --years 3
/data/imbalance-history.json
npm run imbalance:history
imbalance-YYYY-MM-DD.json