When you sell stocks from your holding a broker provides you with trading exposure of 80% of your sell value on the Trade day. This exposure so provided before the settlement of the trade, is termed as Credit for Sale. CFS can only be used for trading purposes. No withdrawals are permitted of the CFS value on the Trade date.
Example:
You sell 20 shares of a stock at ₹1500 each, generating ₹30,000.
On the same day, you can only use ₹24,000 (80%) for new trades.