It sounds like you want to manually trade on the broker of your choice by using Z13 with IEX to read market data and generate trading signals.
You cannot do that because the IEX plugin does not output any options data.
https://manual.zorro-project.com/iex.htmThis plugin only supports the broker command SET_PRICETYPE.
To read options, your plugin needs GET_OPTIONS and SET_SYMBOL (not supported by IEX plugin).
To trade options, you also need GET_POSITION, SET_MULTIPLIER, and optionally SET_COMBO_LEGS for combos (also not supported by IEX plugin).
Notice that all of those functions (and more) are supported by the IB plugin:
http://manual.zorro-trader.com/ib.htm
