The order execution price may be unfavorable due to the following reasons:
1. High market volatility: When the market is highly volatile, the orders may be executed at prices slightly different from the expected price.
2. Low liquidity: In markets with low liquidity, it's difficult to find matches for your orders due to fewer buy and sell orders.
3. Major news release: Release of political news, economic data, or emergency events, leading to sharp fluctuations that may cause slippage.
Any of these reasons can cause the order to be executed at a unfavorable price. To avoid this, you can use limit orders, trade in markets with high liquidity, and closely monitoring market changes.

