risk free? How is it possible? What do you mean with unlimited upside potential and limited downside risk? How can I try on the testnet?
1&2) Shiled protocol is absolutely risk free because it uses a combination of a dual liquidity pool model, SLD (the native token of the platform), a decentralized brokerage system, and external liquidators to counteract the existing limitations. For in depth explanation you can read this medium post
https://shield-dao.medium.com/introducing-the-first-risk-free-perpetual-contract-ca8331574ba73) Usually, with normal perpetuals, the downside can be unlimited in the case of an unfavorable price movement. However, thanks to Shield’s ingenuous funding-fee mechanism, your downside is limited only to the funding fee that you’ve to pay to keep your position open.
The protocol allows the users to open long or short positions with infinite upside potential, without delivery, in a fully trustless manner. The expected payoff is calculated as follows
4) The testnet is available here
http://shieldex.io/