Change in State of Delivery (CISD) is a price-action concept used by traders to identify a potential shift in the way price is being delivered through the market. It is commonly discussed within Smart Money Concepts (SMC) and ICT-style trading approaches. CISD focuses on changes in short-term order flow that may indicate that buyers or sellers are gaining control.

A bullish CISD generally occurs when price changes from delivering lower prices to delivering higher prices with stronger bullish momentum. Conversely, a bearish CISD occurs when price shifts from delivering higher prices toward lower prices. Traders typically observe candle behavior, displacement, liquidity movements, and key price levels to determine whether the delivery of price has changed.

CISD can be particularly useful after a liquidity sweep. For example, price may first take out a previous low before showing strong bullish displacement. This change in delivery can suggest that the market may be transitioning from bearish to bullish order flow. Traders may then look for additional confirmation, such as a Fair Value Gap (FVG), Order Block, or market-structure shift.

One important point is that CISD should not automatically be treated as a guaranteed reversal signal. Markets can produce false shifts, especially during volatile conditions. Traders should therefore combine CISD with broader market context, higher-timeframe bias, liquidity analysis, and appropriate risk management.

In practice, CISD is best viewed as a framework for recognizing changes in price delivery rather than a standalone trading strategy. By studying how candles move and close around important liquidity and structural levels, traders can use CISD to improve their understanding of market momentum and potentially identify higher-probability trading opportunities.