Discount-broker defaults: ₹20 or 0.03% brokerage per order, STT 0.1% delivery both sides (0.025% intraday sell), NSE 0.00297%, SEBI 0.0001%, stamp 0.015% delivery buy (0.003% intraday), 18% GST on brokerage and fees, ₹15.93 DP charge per delivery sell. Slippage is extra and is modelled separately in the simulator.