Bar chart with image markers: https://fiddle.sencha.com/#fiddle/1i0e
visibleRange to actual range https://fiddle.sencha.com/#fiddle/1ilc
candlestick series renderer https://fiddle.sencha.com/#view/editor&fiddle/1lk4
custom sprite example https://fiddle.sencha.com/#fiddle/1onl&view/editor
blinking series marker https://fiddle.sencha.com/#view/editor&fiddle/1vqv