How To Evaluate A Trading System Performance

 

Hello, 

I have programmed, back test and now evaluating different trading strategies profitability performance. The strategies I like are Intra-Day (5, 15, 30, 60 min) max holding time of one day. 

I need help with the following please:

1. Can you please recommend a book for evaluating intraday trading systems?

2. Why is Max Drawdown of trading system so important in simple understanding? I understand what the definition means, but in terms of making money, what the point of it?

3. What are some performance metrics you first review before moving towards to other system validation before going live?

Thanks