Recent declines in the dollar have previously lead to large rallies in DBA. As of yet the current decline in the dollar has not done much for DBA, however I anticipate this to change soon if the dollar continues the current pull back through the summer. A retest of the ~88-89 level on DXY may be coming and if so, DBA may break out of the current down trend which started with the dollar rally.
The declining trend line noted on the chart represents about ~17% gain and would be a reasonable target.