Careful as this is an AIM share and carries a higher risk than normal financial instruments due to low market-cap and (I believe) lower liquidity (more volatility- this is dangerous-)
Why go short?
Because European legislation is lowering down Leveraging capabilities for Traders from 300:1 buying power to 30:1 buying power. (for Plus500 users)
Revenues will be slashed, just wait for the quarterly report that follows the European crackdown on trading brokerages.
Side note: Yes I am aware that Plus500 state they are a market-maker, where the majority of their derive from Spread charges, commission and long-term position holders.. But of course they make money from the uninformed average retail traders, who get destroyed in the markets on a day to day basis.
ALSO, I believe Serious traders would (ideally) move their money over to brokers, exempt from European laws, in order to bypass the leveraging cap + general Margin increases. This directly affects profits for Plus500's investors in a negative manner.
Shorting instruments is dangerous, but good luck anyway.