So I just tried something and bought the $UG3LQ5 an inline OS on $RHM (+2.95%) bought. Bought 100 units at 4.10.
For those who are not so familiar with certificates. The price of $RHM (+2.95%) must move between € 900 and € 1600 by 20.06. in this case. If this works and it does not breach either of the two limits, there is a refund of €10. Otherwise it expires worthless like a KO. But I think the chance of 120% in 7 weeks is ok for the risk. I have also set the SL at €3.50 so that the risk is very limited.