it looks like the fixed cash risk feature does not work with Indices, I found this in the user guide.
A note has been made to update the product page and make it clearer that fixed cash risk does not work with indices. Thank you for a wonderful and clear video report.
I will also get Mike to disable the fixed cash risk option for indices to make it clearer.
After looking a little further if your broker does not support micro-lots for indices, the lowest trade size is 1 lot, this is too large for a small cash risk of only 5, try using % of equity or balance or a broker that supports micro-lots for indices.
I would also download the latest version as we just published an important bug fix.