MRVL stock | 5 min chart | Nov 2 | Trade review | Loss

Trade review:

1. 196.60 -> 191 (Open price) -> 168.58 -> 171.80,  -28.1970 (-14.34%) -2,820
2. Buy 100 @191.95 Fri, Oct 30, 11:10 
3. Sell 100 @186.09 Mon, Nov 2, 07:33 - Loss: $586 US dollars
4. Should take profit on Fri, Oct 30 - Close price $196.60 - Do not take risk - overnight risk 
5. Buy 100 @186.83 Mon, Nov 2, 07:42
6. Sell  100 @183.72 Mon, Nov 2, 07:54 - 12 minutes, Loss: $311 US dollars
7. Buy 100 @184.37  Mon, Nov 2, 08:01 
8. Sell  100 @186.42  Mon, Nov 2, 08:26 - 25 min, gain: $205 US dollars
9. Buy  100 @186.16  Mon, Nov 2, 08:43 
10. Sell   100 @185.04  Mon, Nov 2, 08:45 - 2 min, loss: $112 US dollars
11. Buy   100 @178.17  Mon, Nov 2, 10:57 
12. Buy   100  @178.17 Mon, Nov 2, 10:57
13. Sell    100  @177.29 Mon, Nov 2, 11:15 - 18 minutes, Loss $88 US dollars
14. Sell    100  @177.29 Mon, Nov 2, 11:15 - 18 minutes, loss  $88 US dollars
15. Buy    100  @171.33 Mon, Nov 2, 12:59 
16. Sell     100  @170.02 Mon, Nov 2, 13:10 - 11 minutes, Loss $132 US dollars
17. Buy     100  @171.40 Mon, Nov 2, 13:19 
18. Total loss: 

Questions to ask:

1. Need to learn to short MRVL stock 
2. After market open, stop loss $586 US dollars
3. MRVL stock price drop from $186 to $170, 16 US dollars, what is the way to short MRVL stock?
4. How hard is it to find ways to short MRVL stock and then recover loss after 7:33 stop loss?
5.