Intuition The big pictureA normal candlestick tells you where price went (open, high, low, close). But it hides how much trading happened at each price , and who was aggressive — the buyers hitting the ask or the sellers hitting the bid. Footprint and Volume Profile charts pull back the curtain: they show volume inside each price level. Reading them is the difference between seeing a shadow puppet and seeing the actual hands.
Volume Profile ::= a histogram drawn sideways (volume on the horizontal axis) showing total volume traded at each price level over some period. Answers: at which prices did most business happen? Footprint chart ::= a candle where each cell shows the volume traded at that price, split into bid volume vs ask volume (also called Bid×Ask or cluster chart). Answers: at each price inside this bar, were aggressors buying or selling?
Intuition Why "footprint"?Every trade leaves a mark. The chart shows the footprints big players left as they walked price up or down. Where they stopped and traded heavily = important level.
Intuition WHY split volume into bid vs ask?A trade needs a buyer and a seller — so raw "volume" is neutral. The useful info is who was the aggressor : the one who crossed the spread by hitting a resting order.
Definition Aggressor rule
A trade printed at (or lifting) the ask → an aggressive buyer → counted as ask volume (buy-side aggression).
A trade printed at (or hitting) the bid → an aggressive seller → counted as bid volume (sell-side aggression).
Definition Key profile landmarks
POC (Point of Control) ::= the price with the single highest traded volume ; the "fair price" magnet where most business agreed.Value Area (VA) ::= the price range containing ~70% of total volume , centred around the POC.VAH / VAL ::= Value Area High / Low — the top and bottom edges of the value area.HVN (High Volume Node) ::= a price level (bulge) with lots of volume → acceptance, price tends to stall/consolidate.LVN (Low Volume Node) ::= a thin level → rejection, price tends to move fast through it.
Intuition WHY 70% for the value area?Auction-market theory borrows from statistics: if trade acceptance were roughly bell-shaped, one standard deviation each side of the mean captures ~68–70% of the "mass". The value area is a practical, volume-based stand-in for "where the market considered price fair."
Worked example Reading a single footprint barA down-bar's lowest cells read Bid 900 × Ask 150, Bid 750 × Ask 200.
Why look here? The low is where sellers should be strongest.Bid volume (aggressive selling) dominates → confirms sellers were hammering.
But price stopped falling despite 1650 of aggressive selling → someone absorbed it with limit buys.Δ \Delta Δ absorption + potential reversal signal.
Worked example Example 1 — Compute bar delta and %buyA 5-min bar: V ask = 3200 V_{\text{ask}} = 3200 V ask = 3200 V bid = 1800 V_{\text{bid}} = 1800 V bid = 1800
Step 1: V = 3200 + 1800 = 5000 V = 3200 + 1800 = 5000 V = 3200 + 1800 = 5000 Why? Total volume = sum of both aggressions.Step 2: Δ = 3200 − 1800 = + 1400 \Delta = 3200 - 1800 = +1400 Δ = 3200 − 1800 = + 1400 Why? Signed net aggression; positive → buyers led.Step 3: % Buy = 3200 / 5000 = 64 % \%\text{Buy} = 3200/5000 = 64\% % Buy = 3200/5000 = 64% Why? Normalize so we can compare to other bars.Read: strong buy-dominant bar (64% buys); if price also closed high, aggression and result agree → trend continuation likely.
Worked example Example 2 — Find the POC and Value AreaVolume per price (ticks): 101→100, 102→400, 103→900, 104→300, 105→100. Total V = 1800 V=1800 V = 1800
Step 1 (POC): max is at 103 (900). Why? Most business = fair price.Step 2 (target): T = 0.70 × 1800 = 1260 T = 0.70 \times 1800 = 1260 T = 0.70 × 1800 = 1260 Step 3: Start VA = {103} = 900.Step 4: Compare above (104=300) vs below (102=400). Add 102 (bigger). VA = 900+400 = 1300 ≥ 1260. Stop. Result: POC = 103, VAL = 102, VAH = 103 (VA barely needed one extra level).Read: value sits at 102–103; a move above 104 into thin volume (LVN at 105) would likely be fast (little to trade against).
Worked example Example 3 — Absorption vs breakoutTwo bars, same aggressive-buy volume 2000 at resistance 250:
Bar A: price pushes 250→252. Why matters? Buyers met little resistance → breakout , buy delta produced movement.
Bar B: price stuck at 250, cell shows Ask 2000 × Bid 1900. Why matters? Massive two-sided trade, no progress → absorption ; a limit-seller wall is winning. Fade or wait.
Common mistake "High volume = strong move ahead."Why it feels right: volume = participation, and we associate participation with momentum.
The flaw: high volume with no price change is absorption , the opposite — a big passive player stopping the move.
Fix: always pair volume with displacement . Volume ÷ range matters, not volume alone.
Common mistake "Positive delta means price must go up."Why it feels right: buyers were aggressive, so buyers should win.
The flaw: delta divergence — aggressive buyers keep hitting the ask (Δ > 0 \Delta>0 Δ > 0 absorbing with limits . Aggression lost.
Fix: compare delta to price result . Agreement = trend; divergence = reversal warning.
Common mistake "POC is a fixed support/resistance forever."Why it feels right: it was the fairest price once.
The flaw: POC is period-dependent and migrates as new volume builds. A yesterday POC differs from a developing (intraday) POC.
Fix: label which POC you mean (session, weekly, developing) and expect it to move.
Common mistake "Footprint bid/ask = actual buyers vs sellers count."Why it feels right: the words "bid" and "ask".
The flaw: every trade has both a buyer and seller. Footprint only classifies the aggressor (who crossed the spread), not who "won".
Fix: read it as aggression , not as a headcount of bulls vs bears.
Recall Quick self-test (hide, then answer)
What does a Volume Profile plot on its horizontal axis?
Define POC in one line.
Write the delta formula and say what Δ = 0 \Delta=0 Δ = 0
What's the difference between an HVN and an LVN in terms of price behaviour?
Give the tell for absorption.
Answers: volume-at-price; the highest-volume price level; Δ = V a s k − V b i d \Delta=V_{ask}-V_{bid} Δ = V a s k − V bi d
Recall Feynman: explain to a 12-year-oldImagine a candy shop. A normal chart just says "candy prices went from ₹10 to ₹12 today." Boring. The footprint chart is like a camera inside the shop: it shows that at ₹10, tons of kids rushed to grab candy, and at ₹12, nobody bought. The price where the biggest crowd traded is the POC — the "everyone-agreed" price. If a huge crowd pushes to buy but the price doesn't move up, it means a giant vending machine (a big seller) is quietly handing out all the candy they want — that's absorption , and soon the crowd gets tired. So instead of just seeing the final price, you see the crowd's energy at every price.
Mnemonic Remember the profile map"POC is the peak, VALue hugs 70, thin nodes let price run."
P OC = P eak volume.VA = VA lue = ~70% .L VN = L et price L eap; H VN = H old / H alt.
For delta: "Ask up, Bid down" → ask-volume is the up-pushing (buy) side, bid-volume is the down-pushing (sell) side; Δ \Delta Δ
What does a Volume Profile show that a normal chart does not? The total volume traded at each price level (volume-at-price), drawn as a sideways histogram.
Define the POC (Point of Control). The single price level with the highest traded volume in the chosen period — the "fair price" magnet.
What is the Value Area? The price range containing about 70% of total traded volume, centred on the POC (bounded by VAH and VAL).
Write the delta formula and interpret its sign. Δ = V a s k − V b i d \Delta = V_{ask} - V_{bid} Δ = V a s k − V bi d ; positive = aggressive buyers dominated, negative = aggressive sellers, zero = balanced.
In a footprint cell, what does "ask volume" count? Volume from aggressive buyers who lifted the ask (crossed the spread to buy).
What does an HVN imply for price behaviour? High Volume Node = acceptance; price tends to stall/consolidate there.
What does an LVN imply for price behaviour? Low Volume Node = rejection; price tends to move quickly through it.
What is absorption on a footprint chart? Large aggressive volume with little/no price movement — resting limit orders soaking up the aggression.
What is delta divergence? Aggression (delta) points one way while price result points the other — a warning of absorption/reversal.
Why is footprint bid/ask NOT a count of bulls vs bears? Every trade has a buyer AND seller; it only classifies the aggressor who crossed the spread, not a headcount.
If a bar has V_ask=3200, V_bid=1800, what is %Buy and delta? V=5000, delta=+1400, %Buy=64%.
Why does the Value Area use ~70%? It approximates one standard deviation of the (bell-shaped) trade distribution — where the market treated price as fair.
Candlestick shows OHLC only
Volume per price and aggressor
Aggressive buy = ask volume
Aggressive sell = bid volume
Value Area ~70% volume, VAH/VAL
Intuition Hinglish mein samjhoDekho, normal candlestick sirf itna batata hai ki price kahan gaya — open, high, low, close. Lekin usme yeh chhupa reh jaata hai ki kaunse price par kitna trading hua aur kaun aggressive tha — buyers jo ask pe order lift kar rahe hain ya sellers jo bid pe maar rahe hain. Volume Profile ek side-ways histogram hai jo dikhata hai ki har price level pe kitna volume traded hua. Jis price pe sabse zyada volume — usko POC (Point of Control) kehte hain, matlab "sabne yahin fair maana" wala price. Uske aas-paas ka ~70% volume wala range = Value Area .
Footprint chart ek step aur aage jaata hai: har candle ke andar, har price cell mein alag-alag dikhata hai — bid volume (aggressive selling) aur ask volume (aggressive buying). In dono ka difference hi Delta hai: Δ = V a s k − V b i d \Delta = V_{ask} - V_{bid} Δ = V a s k − V bi d
Sabse important 20% cheez jo 80% edge deti hai: imbalance aur absorption pehchano. Agar bahut saara aggressive volume aa raha hai par price hil hi nahi raha — matlab koi bada player limit orders se saara pressure absorb kar raha hai. Yeh aksar reversal ka signal hota hai. Aur ek trap yaad rakho: sirf positive delta dekh ke "price upar jayega" mat maan lena — agar delta positive hai par price lower highs bana raha hai, yeh delta divergence hai, warning sign. Hamesha delta ko price ke result ke saath compare karo: agree kare toh trend, diverge kare toh reversal ka khatra.
