I don't know where you got the 1.73 support. But it looks to me like there should be some support at the 1.47 - 1.51 level, at least for a bounce.

Lowest tick since mid-May was on July 8 -- hit 1.47and closed at 1.55 that day. Lowest close was a few days later on July 13, with a close at 1.51. With the volume today, we may be close to capitulation. I intend to sell if it falls below 1.50.