The one-line definition

Break of Structure (BOS) ka matlab hai — price ne pichla swing high (uptrend mein) ya swing low (downtrend mein) decisively tod diya. Yeh ek structural event hai, sirf ek bar ka move nahi. BOS ke baad market ka existing trend continue hone ka chance badhta hai, ya transition ka pehla signal milta hai.

Why "structure" matters

Trader manually chart pe ek line khench leta hai pichle high pe. Jab price us line ko cross karti hai, woh kehta hai "structure break ho gaya". Tietiy ka pivot algorithm yeh kaam deterministically karta hai — har shaam 437 stocks pe same rule se. Pivot bana, baad mein wahi pivot cross hua = BOS event.

Analogy: cricket mein ek batsman ne 50 maara, woh ek milestone hai. Phir agar woh apni hi 50 ko 100 mein convert karta hai (cross karta hai), woh structural progression hai — bus ek aur run nahi. Same market mein — pivot cross hona = milestone cross hona.

Two types — bullish BOS vs bearish BOS

  • Bullish BOS — uptrend mein price pichle swing high ko cross kar gayi. Yeh higher-high formation confirm karta hai. Buyers control mein hain, momentum continue ho sakta hai.
  • Bearish BOS — downtrend mein price pichle swing low ko cross kar gayi. Lower-low formation confirm. Sellers control mein.
  • Structure-shift BOS — downtrend mein pehli baar pichla higher swing high tooth, ya uptrend mein pehli baar pichla lower swing low tooth. Yeh sabse important — trend reversal ka pehla concrete sabut.

How tietiy detects BOS

Tietiy ke paas do parallel pivot families hain (see Support & Resistance): lookback_n10 aur zigzag 5%. BOS detect karne ke liye dono families check hoti hain — jo pivot dono families mein converge karte hain, unka break zyada robust BOS event maana jaata hai.

Ek important non-negotiable: last pivot of any family is always provisional. Iska matlab — abhi-abhi banaye gaye pivot pe BOS claim karna risky hai, kyunki woh pivot repaint ho sakti hai. Tietiy ka scanner provisional pivot pe gate nahi laga sakta (CI-enforced rule).

What makes a BOS "clean" vs "fake"

  • Volume confirmation — real BOS usually average se zyada volume ke saath aata hai. Low-volume break aksar fake hota hai.
  • Close beyond, not just wick — bar ki body level ke uss paar close honi chahiye. Sirf wick poke karke wapas aana = trap (see bull/bear trap).
  • Follow-through bar — BOS ke baad agla bar same direction mein continuation dikhana chahiye. Pehle bar mein break, doosre bar mein reverse = jhoota BOS.
  • Context — BOS jab regime supportive ho aur breadth confirm karti ho, woh zyada saaf hota hai. Regime against ho toh BOS often absorption mein khatam ho jaata hai.

What BOS does NOT tell you

  • Target. BOS sirf structural event hai — kitna door price jaayegi, woh momentum, volume, regime aur trader decide karta hai.
  • Entry / SL. BOS ke "kahaan enter karna" aur "kahaan SL" decision aapka. Aksar log retest pe enter karte hain — broken level ne pull back kiya, phir continue.
  • Trend strength. BOS ek binary event hai — hua ya nahi hua. Trend strength ka measurement RS, momentum, volume sab alag layers hain.

Honest takeaway. BOS ek describable structural event hai, prediction nahi. Tietiy ne 44k+ historical pivots par test kiya — BOS event ke baad continuation rate regime-dependent hota hai. Trending regime mein clean BOS = ~60% follow-through. Choppy regime mein same BOS = ~45%. Context matters more than the event itself.