The candlestick is the world's most successful data compression: four numbers per period. The footprint is the decompression — the same period expanded back into volume at every price, split by aggressor side.
| Question | Candlestick | Footprint |
|---|---|---|
| Where did price go? | Yes — OHLC | Yes |
| How much traded at each price? | No | Yes |
| Which side was aggressive? | No | Yes — bid×ask split |
| Was the extreme rejected on volume or on air? | No | Yes |
| Readable across months at a glance? | Yes | Impractical |
| Works on any platform? | Yes | Needs tick processing |
Candlesticks win at range: scanning hundreds of symbols, reading multi-month structure, spotting setups. Footprints win at the moment of decision: what exactly is happening at this level, right now. That asymmetry is why the practical answer is both — candles for the map, footprints for the street view.
Consider a wide-range up candle closing on its high. Bought with stacked ask-side imbalances and expanding volume, it is initiative buying being accepted. Printed on shrinking volume with negative delta — price lifted while sellers aggressed — it is a very different event: someone absorbed selling all the way up. The candle is identical; the footprint tells them apart.
Candles first — market structure vocabulary transfers directly. Footprints add a resolution layer once level-based questions start mattering.
They render, but aggregation dilutes the detail that makes them valuable. Most footprint reading happens on 1-15 minute bars.
VolumeLens provides footprint charts for NSE equities and derivatives with free access to explore — see the footprint page for current limits.