Fixed sawal
Entry 100 aur quantity 2 par Long 110 aur Short 90 ke symmetric exits ka gross PnL kya hai?
Fixed inputs
- entryPrice
- 100
- quantity
- 2
- longExitPrice
- 110
- shortExitPrice
- 90
- leverage
- 5
Hisab ke marahil
- Long PnL = (110 - 100) × 2 = 20.
- Short PnL = (100 - 90) × 2 = 20.
- Notional 200, 5x initial margin 40, ROE magnitude 50%.
Auditable results
- longPnl = 20
- shortPnl = 20
- initialMargin = 40
- roePercent = 50
Matlab
Symmetric arithmetic ka matlab market probability ya execution symmetry nahin.
Symmetry ko khud verify karna
Yeh test apne trade par dohrane ke liye entry price, quantity aur ek fixed price distance choose karein — maslan 3 points — phir Long ke liye entry + 3 aur Short ke liye entry − 3 rakhein. Agar contract linear hai to dono absolute PnL identical aayenge. Jo cheez unhe alag karti hai woh formula nahin, uske baad wali layers hain.
Practice mein farq yahan se aata hai: entry aur exit par maker/taker role alag ho sakta hai, Funding ek side ko pay karwati hai aur doosri ko receive, aur fast market mein ek direction ke fills doosre se zyada slip kar sakte hain. Isi liye do symmetric trades ka net result kabhi kabhi kaafi asymmetric nikalta hai jabke arithmetic bilkul symmetric thi.
Apne exit prices daal kar dono side ka net dekhna ho to PnL aur ROE calculator mein Long aur Short alag alag chala kar compare karein.
Failure conditions aur risk
- Short borrowing/product rules scenario se bahar.
- Slippage sides par mukhtalif ho sakta hai.
PKR equivalent comparison mein fees aur FX zero hain; real fills mukhtalif ho sakte hain.
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