Good question Nigel.
For me first time it has to bounce. However the more times it tests support, the more chance it can fail.
If TREND was clear up then yes I would keep on longing.
As I am not sure of TREND and bought it at support for a bounce only, I do not think I will long again.
Hope that helps but please keep asking away as knowledge is paramount in this game
Plan your trade, trade your plan!