There you go (not tested):

Once PerCent = 0.10      //10%
Once LOrange = 0
Once HIrange = 9999999
If StrategyProfit >= StrategyProfit[1] Then
   LOrange = 0
   HIrange = 9999999
Endif
EntryConditions = 1
EntryConditions = ((Not ((close >= LOrange) and (close <= HIrange))) And LOrange <> 0)
If MyLongConditions and EntryConditions  Then
   Buy 1 contract at Market
   Set Stop pLoss 100
   Set Target pProfit 100
   LOrange = close - (close * PerCent)
   HIrange = close + (close * PerCent)
Endif

The correct code is (still not tested):

Once PerCent = 0.10      //10%
Once LOrange = 0
Once HIrange = 9999999
If StrategyProfit >= StrategyProfit[1] Then
   LOrange = 0
   HIrange = 9999999
Endif
EntryConditions = 1
If LOrange <> 0 Then
   If ((close >= LOrange) and (close <= HIrange)) Then
      EntryConditions = 0
   Endif
Endif
If MyLongConditions and EntryConditions Then
   Buy 1 contract at Market
   Set Stop pLoss 100
   Set Target pProfit 100
   LOrange = close - (close * PerCent)
   HIrange = close + (close * PerCent)
Endif

I found the bug, this works (tested on Dax, Daily TF):

Once PerCent = 0.10      //10%
Once LOrange = 0
Once HIrange = 9999999
EntryConditions = 1
If LOrange <> 0 Then
   If ((close >= LOrange) and (close <= HIrange)) Then
      EntryConditions = 0
   Endif
Endif
MyLongConditions = (Not OnMarket) AND (close > average[10,0](close))
If MyLongConditions and EntryConditions Then
   Buy 1 contract at Market
   Set Stop   pLoss   1000
   Set Target pProfit 1000
   LOrange = close - (close * PerCent)
   HIrange = close + (close * PerCent)
Endif
//graphonprice HIrange coloured(0,255,0,255)
//graphonprice LOrange coloured(255,0,0,255)

As you can see from the screenshot, the strategy stops trading, even if above average within the range, until it’s broken.

x-3.jpg