Buy on Breakout london + Partial closure

Hello, i m new to automatic trading, i m trying to make a very simple strategy about london breakout, i tried many ways but it still does nt work.

Basically : in 1 hour timeframe i look for the high and low of the 3 bars before london opening.

if at some point the price cross the “high of the 3 hours before london opening” ->  buy 2 contracts ,

Set stop loss at low of the “range 3 hours”  ,

Take 50% profit (here 1 contract) at   : the high + “range distance of the 3 hours  range” and move the stop loss at high of the “range 3 hours”

Take 50% profit (the 1 contract still in position) at : the high + 2 * “range distance of the 3 hours  range”

Please could you help me ?

Pictures are always the best to describe so

• I put in attachment a picture of what i would like on the GBP USD TimeFrame 1 Hour, Friday 6 march 2020
• The indicator i use to draw arrows for this strategy.

DEFPARAM CumulateOrders = false // Cumulating positions deactivated
// The system will cancel all pending orders and close all positions at 0:00. No new ones will be allowed until after the "FLATBEFORE" time.
DEFPARAM FLATBEFORE = 060000
// Cancel all pending orders and close all positions at the "FLATAFTER" time
DEFPARAM FLATAFTER = 130000

CountBuy = 0

EMA25 = exponentialaverage[25]

if currenttime = 080000  then
max1 = high
min1 = low
endif

if currenttime = 070000  then
max2 = high
min2 = low
endif

if currenttime = 060000  then
max3 = high
min3 = low
endif

Maximum = max(max1,max(max2,max3))
Minimum = min(min1,min(min2,min3))

if currenttime = 090000  then
EMA25Price = exponentialaverage[25]
endif

RangeSize = Maximum - Minimum


if Maximum > EMA25Price and Minimum > EMA25Price and CountBuy = 0 then


if  time = 080000  and CountBuy = 0 and high < Maximum then

BUY 1 CONTRACTS AT Maximum stop
SET STOP LOSS RangeSize
SET TARGET PROFIT RangeSize

BUY 1 CONTRACTS AT Maximum stop
SET STOP LOSS RangeSize * 2
SET TARGET PROFIT RangeSize

CountBuy = 1

endif

if  currenttime = 090000  and CountBuy = 0 and high < Maximum then

BUY 2 CONTRACTS AT Maximum stop

SET STOP LOSS RangeSize

sell 1 contracts at Maximum + RangeSize limit

sell 1 contracts at Maximum + 2*RangeSize limit

//SET TARGET PROFIT RangeSize

CountBuy =  1
endif

if  currenttime = 100000  and CountBuy = 0 and high < Maximum then

BUY 1 CONTRACTS AT Maximum stop

SET STOP LOSS RangeSize

SET TARGET PROFIT RangeSize

CountBuy =   1

endif

if  currenttime = 110000 and CountBuy = 0 and high < Maximum then

BUY 1 CONTRACTS AT Maximum stop

SET STOP LOSS RangeSize

SET TARGET PROFIT RangeSize

CountBuy =   1

endif

endif

//graph CountBuy

graph Maximum

Break-Out-london-indicator.itf Friday-6-March-GBP-USD-1H.png