Reroll dice that don't reach target number

So can anyone think of a way to use the ro - reroll once dice mechanic to reroll only if the dice total isn't greater that a target number so I'm using a basic dice roll like this: 1d10+4 > ?{target number} or  {3d10+4} > ?{target number}

compensate for the mod in the RO value.  If you want the dice roll to reroll if its below 9, that means you want it to reroll once if its below 5 in the actual dice roll.  

It gets a little more complex than that, I have simplified the dice logic I'm using  {@{SkillLevel+1}d10+@{SkillTotal}+?{Modifier}} > ?{Target Number} is the actual logic.. so you are saying if I want to do Roll once rerolls I'd need to do something like {{@{SkillLevel+1}d10+@{SkillTotal}+?{Modifier}}ro>{?{Target Number}-@{SkillTotal}-?{Modifier}}} > ?{Target Number} because I've tried that and it just doesn't work.. I'm guessing I'm doing something wrong in the format, but what exactly I'm not sure

The ro has to be right next to the dice: 2d10ro3 will reroll everything 3 or lower once.&nbsp; <a href="https://wiki.roll20.net/Dice_Reference#Rerolling_Dice" rel="nofollow">https://wiki.roll20.net/Dice_Reference#Rerolling_Dice</a> <a href="https://wiki.roll20.net/Dice_Reference#Rerolling_Dice_.28B.2CF.29_rCP" rel="nofollow">https://wiki.roll20.net/Dice_Reference#Rerolling_Dice_.28B.2CF.29_rCP</a> Counting successes (using &lt; or &gt;) is also something that goes right after the dice roll.&nbsp; <a href="https://wiki.roll20.net/Dice_Reference#Target_Number_.28Successes.29" rel="nofollow">https://wiki.roll20.net/Dice_Reference#Target_Number_.28Successes.29</a> <a href="https://wiki.roll20.net/Dice_Reference#Target_Number_.2F_Successes_.28B.2CF.29_-_CP" rel="nofollow">https://wiki.roll20.net/Dice_Reference#Target_Number_.2F_Successes_.28B.2CF.29_-_CP</a> You might be able to work something out with group rolls and comparing that to minimum value and keeping the higher one, but that wouldn't reroll anything below the value. &nbsp;&nbsp; <a href="https://wiki.roll20.net/Dice_Reference#Grouped_Rolls" rel="nofollow">https://wiki.roll20.net/Dice_Reference#Grouped_Rolls</a> Instead of counting successes, it might be best to just print to chat the target number so that you have it right there to compare to.&nbsp; On the other hand, if the target is something that variable, it might be best to just leave it out of the macro altogether and just announce the target value.