Function createTier2Indicator

Wrap a Tier-2 descriptor as a normal IndicatorDescriptor.

export const OPEN_INTEREST = createTier2Indicator({
  id: 'open-interest', name: 'Open Interest', placement: 'pane',
  inputs: [{ key: 'symbol', type: 'text', label: 'Symbol', default: '' }],
  plots: [{ key: 'oi', type: 'line', title: 'OI' }],
  refetchOn: ['symbol'],
  fetch: async ({ settings, from, to }) => loadOi(settings.symbol, from, to),
});
registerIndicator(OPEN_INTEREST);
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