update-chart.js

	const updateChart = (data) => {
		let trace_price = {
			x: [data.index.map((t) => new Date(t))],
			y: [data.price],
		};
		let trace_volumes = {
			x: [data.index.map((t) => new Date(t))],
			y: [data.volumes],
		};

		Plotly.update("chart", trace_price, {}, 0);
		Plotly.update("chart", trace_volumes, {}, 1);
	};