Per the python eikon data API:
TR.OPWSettleImpliedVolatility and TR.OPWCloseImpliedVolatility are constantly changing values within the session. How is this possible if this is a settle or close derived value? Also, is there a ek.get_data query that can pull historic readings for the TR.OPW...... data items. I am referencing these in regards to C400L0 (Corn 400 call on the Dec) but I generalize the question in regards to all the composite agriculture options.