With 15-minute prices the chart now has one bar per quarter (92/96/100), not hour averages; hourly and static tariffs still draw one bar per hour. Cheap and dear marks come from the kept priceruns result (battery modes on) or the arbitrage verdict's two points (off), not a thirds split. A missing quarter is an empty bar. Removes plan.average_tip (EN/NL). Co-Authored-By: Claude <noreply@anthropic.com>