Basically, it defaults to the front week/month but you are not stuck with it. You can vary the IV you want to use by clicking on the spanner icon on the far right at the top of your positions and adjust up/down by an absolute amount.
Whether you believe weekly IV is of use or not is your choice and the platform makes no assumptions on the matter.
Whether you believe weekly IV is of use or not is your choice and the platform makes no assumptions on the matter.
Quote from codyhopkins:
Now wouldn't it make more sense to use the closest monthlys for the vol value.