在最后一根k线计算出前面N根k线可以画压力线和支撑线，如何倒回去前面N根k线画线？

Array<Numeric> x1Data;//压力线支撑线x

   Array<Numeric> y1Data;//压力线支撑线y

OnBar(ArrayRef<Integer> indexs)

{

if(BarStatus==2)

{

for i = 0 to length -1

{

Numeric low_1 = low[i];

Numeric low_2 = low[ iif(i>0 , i+1 , i)]

Numeric high_1 = high[i];

Numeric high_2 = high[ iif(i>0 , i+1 , i)];

Numeric index = CurrentBar-i;

Numeric top = boxSupAreaMap[1];

Numeric bot = boxSupAreaMap[3];

//找到压力线 xy

if (low_1 > top and low_2 <= top)

{

ArrayPushBack(x1Data,index);

ArrayPushBack(y1Data,low_2);

}

//找到支撑线 xy

if (high_1 < bot and high_2 >= bot)

{

 ArrayPushBack(x1Data,index);

 ArrayPushBack(y1Data,high_2);

}

 }

}

下面我如何画线？？？？我已经找到了画线开始结束点xy并保存到x1Data和y1Data了。

}