1.) Are the ratios in backtester annualized? I asked the support team and he told me that they use the total returns not the annualized ones.
2.) If the ratios are not annualized, how to annualize them? You can just tell me a method for the Sharpe ratio.
3.) If I run backtest over a 10-year period (or maybe 5-year period), how do I know that my risk-adjusted measures are high enough and can be considered as a great algo? According to QuantStart, it tells us that an annualized Sharpe ratio should be larger than 2. But this is just for annualized ones.