Neither FloXpress nor Flow Simulation can do moving bodies, unfortunately. All bodies are assumed to be rigid. There are a few work arounds you could try, however. These would all involve software above the Xpress level.
1. Create a Parametric study to change the angle of the lure while measuring the forces on both sides. Set the condition to look for when the forces are balanced and you will know how your lure will react.
2. Measure the forces on the faces at different speeds of water and import those into a motion study, which can show dynamic movement but lacks the ability to do moving fluids.
3. Import the pressures from the flow simulation into structural and model the line as flexible rod.
all of the above.
would be interested to understand the goal and scope of the project