'It's hard to be gain trust ratings. But can achieve that though. You just to need create something useful and helpful to the community. Like doing small trades like sell your altcoins for Bitcoin or Bitcoins for altcoins. For every successful trades. The member will give you positive feedback because of the successful trade. But do not force them to give you positive feedback. That's not a good behaviour and abusing trust. You can also offer a service for free. Just like what others was doing here. And one thing i notice. You're a newbie. Make your rank atleast full member or higher in able to find someone you can transact with. No disrespect, but no one trusts newbies these days.'
You may wish to explore the methods.