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@dirslashls Please provide a demo for the issue either with https://codepen.io/Ovilia/pen/dyYWXWM or https://gallery.echartsjs.com/editor.html .

I could not reproduce it on the gallery as it seems to be using 4.8. Below is the options object with which I can reproduce it locally using 5.0.0-beta.2

options = {
	xAxis: {
		data: ['2017-10-24', '2017-10-25', '2017-10-26', '2017-10-27']
	},
	yAxis: {},
	dataZoom: [
		{ show: true, type: 'slider', xAxisIndex: 0 },
		{ show: true, type: 'inside', xAxisIndex: 0 },
	],
	dataset: [
		{ 
			dimensions: [
				{ name: "Date"},
				{ name: "Open"},
				{ name: "Adj Close" },
				{ name: "Low" },
				{ name: "High" }
				],
			source: [
			['2017-10-24',20, 30, 10, 35],
			['2017-10-25',40, 35, 30, 55],
			['2017-10-26',33, 38, 33, 40],
			['2017-10-27',40, 40, 32, 42]]
		}],
	series: [{
		type: 'candlestick',
		encode: {
			x: 0,
			y: [1,2,3,4]
		}
	}]
	};

Unkown dimension open is not concerning, but there is an error which should be fixed.

This issue is labeled with priority: high , which means it's a frequently asked problem and we will fix it ASAP.

coordinate 'open' is necessary in candlestick.
Just like coordinate 'x' , 'y' are necessary in cartesian scatter.