Dema Variable Set Incorrectly

[12ka4]

I am facing the problem of setting the syntaxes correctly in the "DEMA VARIABLES" section of the below code.

Also do tell what to include after "#include " section with respect to Dema Variables.

I get the errors

'DEMA1' - variable not defined.

'DEMA2' - variable not defined.

'DEMA3' - variable not defined.

Please help.

if (TradeOrAlert) {

if (DEMA1)>(DEMA2) {CLOSESHORT(Symbol()) ;}

if (DEMA1)<(DEMA2) {CLOSELONG(Symbol()) ;}

if ((DEMA1)>(DEMA2)) && ((DEMA2)>(DEMA3)) {BUY(Symbol(), B_Symbol_LS_0, B_Symbol_TP_0, B_Symbol_SL_0, B_Symbol_TS_0, "if ((DEMA1)>(DEMA2)) && ((DEMA2)>(DEMA3))";}

if ((DEMA1)<(DEMA2)) && ((DEMA2)<(DEMA3)) {SELL(Symbol(), S_Symbol_LS_0, S_Symbol_TP_0, S_Symbol_SL_0, S_Symbol_TS_0, "if ((DEMA1)<(DEMA2)) && ((DEMA2)<(DEMA3))";}

CheckTrailingStop(Symbol(), 0, MagicNumberLong, B_Symbol_TS_0);

CheckTrailingStop(Symbol(), 1, MagicNumberShort, S_Symbol_TS_0);

} else {

if (DEMA1)>(DEMA2) {MyAlert("if (DEMA1)>(DEMA2)", "CLOSESHORT(Symbol(),0.1,100,15,17)", Symbol());}

if (DEMA1)<(DEMA2) {MyAlert("if (DEMA1)<(DEMA2)", "CLOSELONG(Symbol(),0.1,100,15,17)", Symbol());}

if ((DEMA1)>(DEMA2)) && ((DEMA2)>(DEMA3)) {MyAlert("if ((DEMA1)>(DEMA2)) && ((DEMA2)>(DEMA3))", "BUY(Symbol(),0.1,100,15,17)", Symbol());}

if ((DEMA1)<(DEMA2)) && ((DEMA2)<(DEMA3)) {MyAlert("if ((DEMA1)<(DEMA2)) && ((DEMA2)<(DEMA3))", "SELL(Symbol(),0.1,100,15,17)", Symbol());}

}

g_bars_276 = Bars;

return (0);

}

//----DEMA VARIABLES----Not properly set, help needed-----

int start() {

double DEMA1 = (iMA(NULL,NULL,4,0,MODE_EMA,PRICE_CLOSE,0))*2 - (iMA(NULL,NULL,4,0,MODE_EMA,iMA(NULL,NULL,4,0,MODE _EMA,PRICE_CLOSE,0),0));

return(DEMA1);

}

int start() {

double DEMA2 = (iMA(NULL,NULL,6,0,MODE_EMA,PRICE_CLOSE,0))*2 - (iMA(NULL,NULL,6,0,MODE_EMA,iMA(NULL,NULL,6,0,MODE _EMA,PRICE_CLOSE,0),0));

return(DEMA2);

}

int start() {

double DEMA3 = (iMA(NULL,NULL,12,0,MODE_EMA,PRICE_CLOSE,0))*2 - (iMA(NULL,NULL,12,0,MODE_EMA,iMA(NULL,NULL,12,0,MO DE_EMA,PRICE_CLOSE,0),0));

return(DEMA3);

}

//