The Coal India plan and the chance of being stopped on noise

On the pullback day (6 Apr 2026) Coal India had high ₹461.45, low ₹447.40 and 14-day ATR ₹13.67. (a) Compute the buy-stop trigger, the fill (trigger plus 0.1%), the initial stop (to two decimals, rounding up), the risk per share and $Q$. (b) Using M04A (4A.12), express the stop distance in daily standard deviations $k$. (c) Using the driftless formula $2\Phi(-k/\sqrt n)$ of M04A Table 4A.1, compute the probability that the stop is touched within 10 sessions. Explain why the time stop of rule 9 matters more for this setup than for a setup with a 3-ATR stop.