Variable expressions are not allowed on global scope

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Hello, I am attempting to convert a pine script code to mt4 expert advisor but I keep getting this error for my variables. I appreciate any help. Thanks


#property copyright "Jacob Mastroianni"
#property link      "https://www.mql5.com"
#property version   "1.00"
#property strict
//--- input parameters

string   bos_type; "Close and Open"                      title="MSB trigger"                            

bool  pv2_sv; "true"                                     title="Display 2nd order pivots"

bool  bos_sv; "true"                                     title="Highlight candles that broke structure"

bool  msb_sv; "true"                                     title="Plot market structure broke lines"

bool  box_sv; "true"                                     title="Plot demand boxes"

int   box_test_delay; "3"                                title="Delay to count test of demand box"

int   box_fill_delay; "3"                                title="Delay to count fill of demand box"

bool  box_test_sv; "true"                                title="Dim tested demand boxes"

bool  box_stop_sv; "true"                                title="Stop plotting filled demand boxes"



var float[] pvh1_price      = array.new_float   (1000, na)          // high

var int[]   pvh1_time       = array.new_int     (1000, na)

var float[] pvl1_price      = array.new_float   (1000, na)          // low

var int[]   pvl1_time       = array.new_int     (1000, na)



var float[] pvh2_price      = array.new_float   (1000, na)          // higher high

var int[]   pvh2_time       = array.new_int     (1000, na)

var float[] pvl2_price      = array.new_float   (1000, na)          // lower low

var int[]   pvl2_time       = array.new_int     (1000, na)



var float   htcmrll_price   = na                                    // high that created most recent ll

var int     htcmrll_time    = na

var float   ltcmrhh_price   = na                                    // low that created most recent hh

var int     ltcmrhh_time    = na



var box[]   long_boxes      = array.new_box()

var box[]   short_boxes     = array.new_box()

var box[]   oldlong_boxes   = array.new_box()

var box[]   oldshort_boxes  = array.new_box()



var line[]  bull_bos_lines  = array.new_line()

var line[]  bear_bos_lines  = array.new_line()



var label[] la_ph2          = array.new_label   (1000, na)

var label[] la_pl2          = array.new_label   (1000, na)



var float   temp_pv_0       = na

var float   temp_pv_1       = na

var float   temp_pv_2       = na



bool        pvh             = high < high[1] and high[1] > high[2]

bool        pvl             = low > low[1] and low[1] < low[2]



int         pv1_time        = bar_index[1]

float       pv1_high        = high[1]

float       pv1_low         = low[1]

float       trigger_high    = bos_type=="High and Low" ? high : math.max(open, close)

float       trigger_low     = bos_type=="High and Low" ? low : math.min(open, close)



bool        bos_candle      = false

bool        new_ph_2nd      = false

bool        new_pl_2nd      = false


if barstate.isconfirmed



    if pvh

        array.pop(pvh1_price)

        array.pop(pvh1_time)

        array.unshift(pvh1_price, pv1_high)

        array.unshift(pvh1_time, pv1_time)

        if array.size(pvh1_price) > 2

            temp_pv_0 := array.get(pvh1_price, 0)

            temp_pv_1 := array.get(pvh1_price, 1)

            temp_pv_2 := array.get(pvh1_price, 2)

            if temp_pv_0 > temp_pv_1

                for i = 0 to array.size(pvl1_time) - 1 by 1

                    temp_ltcmrhh_time = array.get(pvl1_time, i)

                    if temp_ltcmrhh_time < array.get(pvh1_time, 0)

                        ltcmrhh_price := array.get(pvl1_price, i)

                        ltcmrhh_time := temp_ltcmrhh_time

                        break

            if temp_pv_0 < temp_pv_1 and temp_pv_1 > temp_pv_2

                array.pop(pvh2_price)

                array.pop(pvh2_time)

                array.unshift(pvh2_price, temp_pv_1)

                array.unshift(pvh2_time, array.get(pvh1_time, 1))

                new_ph_2nd := true



    if pvl

        array.pop(pvl1_price)

        array.pop(pvl1_time)

        array.unshift(pvl1_price, pv1_low)

        array.unshift(pvl1_time, pv1_time)

        if array.size(pvl1_price) > 2

            temp_pv_0 := array.get(pvl1_price, 0)

            temp_pv_1 := array.get(pvl1_price, 1)

            temp_pv_2 := array.get(pvl1_price, 2)

            if temp_pv_0 < temp_pv_1

                for i = 0 to array.size(pvh1_time) - 1 by 1

                    temp_htcmrll_time = array.get(pvh1_time, i)

                    if temp_htcmrll_time < array.get(pvl1_time, 0)

                        htcmrll_price := array.get(pvh1_price, i)

                        htcmrll_time := temp_htcmrll_time

                        break

            if temp_pv_0 > temp_pv_1 and temp_pv_1 < temp_pv_2

                array.pop(pvl2_price)

                array.pop(pvl2_time)

                array.unshift(pvl2_price, temp_pv_1)

                array.unshift(pvl2_time, array.get(pvl1_time, 1))

                new_pl_2nd := true



    if trigger_high > htcmrll_price

        if msb_sv

            array.push(bull_bos_lines, line.new(x1=htcmrll_time, y1=htcmrll_price, x2=bar_index, y2=htcmrll_price, color=color.red, width=2))

        if box_sv

            array.push(long_boxes, box.new(left=array.get(pvl1_time, 0), top=math.min(high[bar_index - array.get(pvl1_time, 0)], high[bar_index - array.get(pvl1_time, 0) + 1]), right=bar_index, bottom=array.get(pvl1_price, 0), bgcolor=color.rgb(0, 255, 0, 80), border_color=color.rgb(0, 255, 0, 80), extend=extend.right))

        bos_candle := true

        htcmrll_price := na

        htcmrll_price



    if trigger_low < ltcmrhh_price

        if msb_sv

            array.push(bear_bos_lines, line.new(x1=ltcmrhh_time, y1=ltcmrhh_price, x2=bar_index, y2=ltcmrhh_price, color=color.green, width=2))

        if box_sv

            array.push(short_boxes, box.new(left=array.get(pvh1_time, 0), top=array.get(pvh1_price, 0), right=bar_index, bottom=math.max(low[bar_index - array.get(pvh1_time, 0)], low[bar_index - array.get(pvh1_time, 0) + 1]), bgcolor=color.rgb(255, 0, 0, 80), border_color=color.rgb(255, 0, 0, 80), extend=extend.right))

        bos_candle := true

        ltcmrhh_price := na

        ltcmrhh_price



    if array.size(short_boxes) > 0

        for i = array.size(short_boxes) - 1 to 0 by 1

            tbox = array.get(short_boxes, i)

            top = box.get_top(tbox)

            bottom = box.get_bottom(tbox)

            if trigger_high > bottom and box.get_left(tbox) + box_test_delay < bar_index and box_test_sv

                box.set_bgcolor(tbox, color.rgb(192, 192, 192, 80))

                box.set_border_color(tbox, color.rgb(192, 192, 192, 80))

            if trigger_high > top and box.get_left(tbox) + box_fill_delay < bar_index

                if box_stop_sv

                    box.set_right(tbox, bar_index)

                    box.set_extend(tbox, extend.none)

                    array.unshift(oldshort_boxes, tbox)

                    array.remove(short_boxes, i)



    if array.size(long_boxes) > 0

        for i = array.size(long_boxes) - 1 to 0 by 1

            lbox = array.get(long_boxes, i)

            top = box.get_top(lbox)

            bottom = box.get_bottom(lbox)

            if trigger_low < top and box.get_left(lbox) + box_test_delay < bar_index and box_test_sv

                box.set_bgcolor(lbox, color.rgb(192, 192, 192, 80))

                box.set_border_color(lbox, color.rgb(192, 192, 192, 80))

            if trigger_low < bottom and box.get_left(lbox) + box_fill_delay < bar_index

                if box_stop_sv

                    box.set_right(lbox, bar_index)

                    box.set_extend(lbox, extend.none)

                    array.unshift(oldlong_boxes, lbox)

                    array.remove(long_boxes, i)

    if pv2_sv

        if new_ph_2nd

            array.pop(la_ph2)

            array.unshift(la_ph2, label.new(x = array.get(pvh2_time, 0), y = array.get(pvh2_price, 0), xloc = xloc.bar_index, style = label.style_label_down,    color = #770000FF, size = size.tiny))

        if new_pl_2nd

            array.pop(la_pl2)

            array.unshift(la_pl2, label.new(x = array.get(pvl2_time, 0), y = array.get(pvl2_price, 0), xloc = xloc.bar_index, style = label.style_label_up,      color = #007700FF, size = size.tiny))



barcolor(bos_candle and bos_sv ? clrYellow : na)
 
jacobmastroianni:

Hello, I am attempting to convert a pine script code to mt4 expert advisor but I keep getting this error for my variables. I appreciate any help. Thanks


Your code syntax is not correct for mql. I suggest you look at the documentation 
 
jacobmastroianni: Hello, I am attempting to convert a pine script code to mt4 expert advisor but I keep getting this error for my variables. I appreciate any help. Thanks

TradingView and MetaTrader are completely different platforms. PineScript and MQL are completely different programming languages. You can't just copy/paste your way through it in hopes that it will work.

In must be totally redesigned. Not only is the language different, but the methodology is different too. The underlaying system is also completely different.

Just like a human language translator has to be fluent in both languages in order carry out translations, the same applies here. You will have to be fluent in both languages and systems to be able to convert it.

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