Find Average Difference of 2 Columns Based on Criteria from 2 Other Columns

Hello,

Can someone please help me derive a formula to take the difference between two columns and find the average, based on two separate column parameters please? I would like the formulas to produce the following results:

1. Average hold time for long trades. Average of difference between column D and C, based only on column A and F. Cannot count trades with same number more than once (column A) and F must be "Long"

2. Average hold time for specific instrument. Average difference between column D and C, based only on column A and G. Cannot count trades with same number more than once (column A) and G must be "NQ" If this formula is the same as #1., please let me know and I will fill in what's needed.

3. Avereage hold time in month of May only. Average of difference between column D and C, based only on column A and B. Cannot count trades with same number more than once (column A) and B is are all those applicable trades in May.

4. Total # of trades in May. Count all trades in May but don't count trades with same number (column A) more than once.

5. Count all the losing trades (column I) in May, but not the trades with the same number more than once (column A)

Please include the entire table including blanks and have formulas ignore blanks. All answers are adjacent highlighted cells where formulas would be entered. Let me know if there's any questions or need for clarification.

Thank you in advance!