6.4.6
Intuition Ek-sentence wali ideaDelta measure karta hai ki trades buyers ne aggressively ask uthake kiye ya sellers ne aggressively bid pe maara — aur Cumulative Delta bas usi tug-of-war ka time ke saath running total hai.
Price akela batata hai ki market kahaan gayi. Yeh nahi batata ki kisne use wahaan push kiya ya kitni force se . Do candles bilkul identical dikh sakti hain, lekin ek desperate buyers ne drive ki hogi aur doosri trapped sellers ne.
Delta yeh answer karta hai: "Jo bhi volume trade hua, kya wo aggressive buyers ne initiate kiya ya aggressive sellers ne?"
Definition Aggressor / Market OrderHar trade ke liye ek resting limit order aur ek incoming market order (jo aggressor hai) chahiye hota hai. Aggressor woh hota hai jo "spread cross" karta hai aur trade print karwata hai.
Aggressor ask pe buys karta hai → buy volume mein count hota hai
Aggressor bid pe sells karta hai → sell volume mein count hota hai
Ek chosen interval ke liye (ek single trade, ek candle, ek session):
Delta = ( Volume traded at the ask ) − ( Volume traded at the bid ) Positive delta ⇒ buyers zyada aggressive the. Negative delta ⇒ sellers zyada aggressive the.
Interval mein har executed trade lo. Har trade ka ek size v i
Har trade ko tick / bid-ask rule se classify karo:
s i = { + 1 − 1 trade printed at the ask (buyer aggressor) trade printed at the bid (seller aggressor)
Delta saare trade sizes ka signed sum hai:
Δ = i = 1 ∑ N s i v i Bas itna hi hai — delta sirf "buy-initiated volume minus sell-initiated volume" se zyada kuch nahi. Koi magic nahi.
Definition Cumulative Delta (CVD)Ek chosen start point se (usually session open) delta ka running sum :
CVD k = ∑ j = 1 k Δ j = CVD k − 1 + Δ k net aggression flow dikhata hai.
Intuition Cumulative kyun?Ek single candle ka delta noisy hota hai. Use sum karne se noise smooth ho jaati hai aur aggression ki persistent direction reveal hoti hai — jaise individual transactions ki jagah apna bank balance track karna.
Woh 20% jo 80% edge deta hai woh hai divergence spot karna:
Price
CVD
Matlab
Higher high
Higher high
Healthy uptrend, buyers confirm kar rahe hain
Higher high
Lower high
Bearish divergence — price upar lekin buyers follow nahi kar rahe → possible reversal
Lower low
Lower low
Healthy downtrend
Lower low
Higher low
Bullish divergence — new low ke bawajood sellers exhausted hain
Intuition Divergence kyun matter karta haiAgar price new high banaye lekin CVD nahi banata, toh rally limit-order absorption ya short-covering pe chal rahi hai, fresh aggressive buying pe nahi. Fuel khatam ho gaya.
Worked example Example 1 — Ek candle ka basic deltaEk 1-minute candle mein yeh trades print hote hain:
100 contracts at ask, 40 at ask, 30 at bid, 90 at bid.
Step 1: Ask volume sum karo B = 100 + 40 = 140 Kyun? Yeh buyer-initiated trades hain.
Step 2: Bid volume sum karo S = 30 + 90 = 120 Kyun? Seller-initiated trades.
Step 3: Δ = B − S = 140 − 120 = + 20 Kyun? Positive → buyers is minute thoda zyada aggressive the.
Check: Total volume = 140 + 120 = 260 2 V + Δ = 2 260 + 20 = 140 = B
Worked example Example 2 — Cumulative Delta bananaSuccessive candle deltas: + 20 , − 50 , + 10 , + 60
Step 1: CVD₁ = + 20 Step 2: CVD₂ = 20 + ( − 50 ) = − 30 Kyun? Candle 2 mein sellers dominant the, running total ko negative le gaye.
Step 3: CVD₃ = − 30 + 10 = − 20 Step 4: CVD₄ = − 20 + 60 = + 40 Kyun? Strong buying candle ne net flow ko positive kar diya.
Dhyaan do CVD + 40 20 − 50 + 10 + 60 = 40
Worked example Example 3 — Buy volume reconstruct karnaEk candle ka total volume V = 500 Δ = − 120 Step 1: B = 2 500 + ( − 120 ) = 190 Step 2: S = 2 500 − ( − 120 ) = 310 Kyun? Zyada volume aggressively sell hua (310) rather than buy (190), jo negative delta ke saath consistent hai.
Check: B + S = 500 B − S = − 120
Common mistake "Positive delta matlab price zarroor upar jayegi."Kyun sahi lagta hai: Zyada buying price ko upar push karni chahiye , hai na?
Fix: Delta aggression measure karta hai, outcome nahi. Agar aggressive buyers lete rahen lekin ek bada limit seller sab absorb kar le, toh price flat rahegi ya positive delta ke bawajood gir bhi sakti hai. Yeh absorption khud ek powerful signal hai — resting seller jeet raha hai.
Common mistake "Delta aur volume same cheez hain."Kyun sahi lagta hai: Dono trades se compute hote hain.
Fix: Volume B + S B − S zero delta ho sakta hai agar buying aur selling aggression balanced thi.
Common mistake "Cumulative Delta resets sirf cosmetic hain."Kyun sahi lagta hai: Woh same running sum hai.
Fix: Start point bahut zyada matter karta hai . Session-anchored CVD ek alag kahani batata hai rather than rolling-window CVD. Divergence padhne se pehle hamesha apna anchor jaano.
Common mistake "Bid/ask classification exact hai."Kyun sahi lagta hai: Exchanges trades ko precisely timestamp karte hain.
Fix: Practice mein, bid aur ask ke beech trades, ya fast quote changes, algorithms (tick rule, Lee-Ready) ko aggressor estimate karne par majboor karte hain. Delta ek bahut achha approximation hai, gospel nahi.
Recall Delta ka formula kya hai aur uske sign ka kya matlab hai?Δ = B − S
Recall V = 800 Δ = + 200 B B = 2 V + Δ = 2 800 + 200 = 500
Recall Price new high banata hai lekin CVD lower high banata hai. Yeh kya hai aur kya warn karta hai?Bearish divergence — new price high ke peeche fresh aggressive buying nahi hai; possible reversal / exhaustion.
Recall Feynman: delta ko ek 12-saal ke bachche ko explain karo.Socho ek tug-of-war rope hai. Har second, hum count karte hain ki buy side pe kitne bacche zor se kheench rahe hain minus sell side pe kitne zor se kheench rahe hain. Agar zyada buy-kids yank karte hain, toh number positive hai. Cumulative delta bas yeh number har second add karte rehna hai taaki dekh sako kaun si team dheere dheere jeet rahi hai poore game mein — chahe rope ka flag (price) abhi zyada move na hua ho.
"Ask = Attack up, Bid = Batter down."
Delta = A sk − B id. Cumulative = battle ka B ank B alance rakho (running total).
Delta ko kaunse subtraction se define kiya jaata hai? Volume at ask minus volume at bid (B − S
Positive delta ka matlab kya hai? Aggressive buyers (market buys lifting the ask) interval mein dominant the.
Cumulative Delta kaise compute hota hai? Har interval ke delta ka running sum: C V D k = C V D k − 1 + Δ k
B aur S ke terms mein total volume? V = B + S
V aur Δ diye hone par buy volume B ka formula? B = ( V + Δ ) /2
V aur Δ diye hone par sell volume S ka formula? S = ( V − Δ ) /2
Price new high + CVD lower high = ? Bearish divergence (buying aggression high ko confirm nahi kar rahi).
Price new low + CVD higher low = ? Bullish divergence (new low ke bawajood selling exhaustion).
Positive delta hone par bhi price kyun gir sakti hai? Ek bada resting limit seller aggressive buying ko absorb kar leta hai (absorption).
Volume aur delta mein farq? Volume = B+S (unsigned magnitude); Delta = B−S (signed net aggression).
Trade mein 'aggressor' kaun hota hai? Woh market order jo spread cross karta hai aur trade print karwata hai.
Kya ek high-volume candle ka zero delta ho sakta hai? Haan — agar aggressive buying aur selling perfectly balanced hon.
Divergence signals reversal
