Common order types can be simplified into the following categories, the core logic is easy to understand:

1. Market Order

- Buy/sell directly at the current market price, seeking quick transactions, which may involve price deviation (slippage).

2. Limit Order

- Set your target price, and wait for the market to drop/rise to this price to execute, for example, "buy at 100 yuan" or "sell at 200 yuan".

3. Stop Loss Order

- A protective mechanism to prevent losses from expanding, for example, setting "automatically sell if it drops below 150 yuan" while holding an asset.

4. Take Profit Order

- An order to lock in profits, for example, "automatically sell if it rises to 300 yuan", to avoid profit shrinkage due to price declines.

5. Conditional Order

- A complex combination order that triggers only when multiple conditions are met, for example, "sell at price B if it drops below A".

In summary: Market orders are fast but unpredictable in price, limit orders control the price but may not execute, stop loss/take profit orders manage risk and reward, and conditional orders implement combination strategies.