Voilà:

Timeframe(default)
ONCE Capital = 10000
ONCE TP      = 100 * PipSize
ONCE SL      = min(30 * PipSize,Capital * 0.01)
//
Timeframe(15mn,UpdateOnClose)
ONCE Periods = 20
HH           = highest[Periods](high)
LL           = lowest[Periods](low)
//
Timeframe(1mn,UpdateOnClose)
ONCE BreakOutL = 0
ONCE BreakOutS = 0
IF OnMarket THEN
   EntryL    = 0
   EntryS    = 0
   BreakOutS = 0
   BreakOutL = 0
ENDIF
IF (BreakOutL = 0) OR (HH <> HH[1]) THEN
   BreakOutL = close CROSSES OVER  HH[1]
   IF BreakOutL THEN
      EntryL    = HH[1]
      BreakOutS = 0
      EntryS    = 0
   ENDIF
ENDIF
IF (BreakOutS = 0) OR (LL <> LL[1]) THEN
   BreakOutS = close CROSSES UNDER LL[1]
   IF BreakOutS THEN
      EntryS    = LL[1]
      BreakOutL = 0
      EntryL    = 0
   ENDIF
ENDIF
//
Timeframe(default)
IF EntryL AND Not OnMarket THEN
   BUY 1 CONTRACT AT EntryL LIMIT
   SET TARGET PROFIT TP
   SET STOP   LOSS   SL
ENDIF
IF EntryS AND Not OnMarket THEN
   SELLSHORT 1 CONTRACT AT EntryS LIMIT
   SET TARGET PROFIT TP
   SET STOP   LOSS   SL
ENDIF
//
//graphonprice HH
//graphonprice LL
//graphonprice EntryL coloured(0,0,255,255)
//graphonprice EntryS coloured(255,0,0,255)