Conditional/Persistent conditions coding

Hi Team, My warmest and deepest appreciation to all the great minds here, active and lurking.
MQL4 coder newbie here..

I was not sure where the proper forum for this post should be, so if this is not the correct forum, apologies in advance.

Looking for MQL4 code which will check for ConditionA(((dData1 + dData2) > dData3 + dData4)) over a lookback period of [X# of bars of Period () ], and if == True, if ConditionB == True, Period(), then Buy.

It would also need to check for no new conditions, ie:ConditionC occurred during lookback period. If ConditionC occurs during same lookback period and ConditionC is the most recent condition, then cancel ConditionA, and use ConditionC.

Any ideas?
Thanks in advance for your time to consider this request.

You will need IF statements
The look back data would be in other if statements within indicators eg:

for an MA cross where i and i +1 is the time bars

bool IsMA1CrossMA2Up(int i, int tf = 0) {
double p1_1 = iMA(NULL, tf, MA1_Period, MA1_Shift, MA1_Method, MA1_AppliedPrice, i);
double p1_2 = iMA(NULL, tf, MA1_Period, MA1_Shift, MA1_Method, MA1_AppliedPrice, i+1);
double p2_1 = iMA(NULL, tf, MA2_Period, MA2_Shift, MA2_Method, MA2_AppliedPrice, i);
double p2_2 = iMA(NULL, tf, MA2_Period, MA2_Shift, MA2_Method, MA2_AppliedPrice, i+1);
return(p1_1 > p2_1 && !(p1_2 > p2_2) );