This is a modification of indicator Better TickVolume with paint bar functionality. Please notice that this indicator only paint the bar, and not showing the tick volume. To show the...

Good old Volume Oscilator with histogram to show volume difference: - Blue if volume is higher than previous one. - Gray if volume is lower than previous.  

This oscilator is a work by Walid Khalil and David Steckler, converted from mt4. The original article about Volume Zone Oscilator can be found here: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=0CDYQFjAEahUKEwjttdKBk8nHAhUKWBQKHc-4AII&url=http%3A%2F%2Fwww.informedtrades.com%2Fattachments%2F2505d1280781350-volume-analysis-volumezoneoscillator-pdf&ei=DfPeVa37LYqwUc_xgpAI&usg=AFQjCNERgAP9HWhjdymhntdUXeTXdtrTpg&sig2=KPwu0ceYrDZ7glrZa5_x2A   A (highly) simplified interpretation...