Biotech Stocks & Misc Questions

Dear Mr. Pat,
I appreciate your kind support & advice regarding below questions:
1) Biotech stocks have higher % returns & risky & should always take half position, could I form a portfolio of 20 biotech stocks with half position only (and sell on earning release), Pls. advise?
2) Pls. provide the best “Biotech Stock Screen”?
3) If biotech stock is in the first 40 industry groups, then it will be shown in key list (if satisfy all screen rules) for trading half position or quarter position size?
4) If Biotech stock is gapped-up due to earnings or news, could we enter trade using which timeframe?
5) How to avoid biotech news in order to trade biotech stocks safely?
6) In which market status (i.e. choppy market) I must buy half position only? in Key List where to know the market status to buy only half position?
7) Normally you run MarketSmith screens on weekly basis each Sunday, in earnings season you run them daily, what are the “start & finish dates” of each earning season?
8) What means by (i) Industry Group (A, B, C, D) (ii) difference between this one & industry groups 193? (iii) Timeliness Rating (A, B, C)?
9) To know the “Industry Group is trending-up or trending-down”, I should use divergence of “RS Rating vs. group price”? or use its moving averages (EMA8, SMA20, SMA50)?
10) During which market conditions (i.e. in correction, etc.) you won’t scan MarketSmith for stock’s potential buy setups?
Regards,
Essam