waterfall: each step floats from where the one before ended.
1The chart tag and its databars/waterfall.padpad
{chart'waterfall',label='step',value='amount',total='Profit',title='From revenue to profit, in thousands',width=640,height=340}
step,amount
Revenue,420
Cost of sales,-180
Salaries,-120
Rent,-24
Tax,-35
Subsidy,12{/chart}