Streak.world is described as 'Algo trade without coding - Trade on US & crypto exchanges in one place. Create, Backtest, Deploy trading ideas in seconds'. There are six alternatives to Streak.world, not only websites but also apps for iPhone. The best alternative is QuantConnect, which is both free and Open Source. Other great sites and apps similar to Streak.world are Algovest (Freemium), Quantreex (Freemium), CloudQuant (Free) and quantra (Free).
Quantreex is a web based trading platform that let you create automated trading strategies in less than a minute. You can backtest, optimize and execute orders with multiple brokers. No coding is required.
Crowd based algorithmic trading development and backtesing for stock market trading. Incubator for Trading Strategies. If your strategy proves itself in backtesting then CloudQuant will provide capital to trade the US markets.