public void calcMACD()
{
int cnt = this.mCandleCnt;
if (cnt < 5)
{
return;
}
float[] val = mPrices;
float[] ema12 = Share.EMA(val, 0, cnt, 12, null);
float[] ema26 = Share.EMA(val, 0, cnt, 26, null);
float[] macd = pMACD;
for (int i = 0; i < cnt; i++)
{
macd[i] = ema12[i] - ema26[i];
}
//======signal======EMA9 of MACD
float[] sig = pMACDSignal9;
sig[0] = macd[0];
float exp = (float)2 / (Context.getInstance().mOptMACDSignal + 1);
for (int i = 1; i < cnt; i++)
{
sig[i] = (float)macd[i] * exp + (float)sig[i - 1] * (1 - exp);
}
//=======histogram===============
float[] his = pMACDHistogram;
for (int i = 0; i < cnt; i++)
{
his[i] = macd[i] - sig[i];
}
//====================================
ema12 = null;
ema26 = null;
}
public override void render(xGraphics g)
{
int mH = getH();
int mW = getW();
if (isHiding())
{
return;
}
Share share = getShare(3);
if (share == null)
{
return;
}
if (detectShareCursorChanged())
{
share.calcOBV();
mChartLineXY = allocMem(mChartLineXY, mChartLineLength * 2);
float min = 0xffffff;
float max = -0xffffff;
for (int i = share.mBeginIdx; i <= share.mEndIdx; i++)
{
if (share.pOBV[i] > max)
{
max = share.pOBV[i];
}
if (share.pOBV[i] < min)
{
min = share.pOBV[i];
}
}
pricesToYs(share.pOBV, share.mBeginIdx, mChartLineXY, mChartLineLength, min, max);
if (mContext.mOptOBV_EMA > 0)
{
mChartEMA = allocMem(mChartEMA, mChartLineLength * 2);
if (mContext.mOptOBV_EMA_ON[0])
{
Share.EMA(share.pOBV, share.getCandleCount(), (int)mContext.mOptOBV_EMA, share.pTMP);
}
else
{
Share.SMA(share.pOBV, 0, share.getCandleCount(), (int)mContext.mOptOBV_EMA, share.pTMP);
}
pricesToYs(share.pTMP, share.mBeginIdx, mChartEMA, mChartLineLength, min, max);
}
}
if (mChartLineLength == 0)
{
return;
}
//========================
if (mShouldDrawGrid)
{
drawGrid(g);
}
//===============================================
// OBV
g.setColor(0xff00f000);
g.drawLines(mChartLineXY, mChartLineLength, 1.5f);
if (mContext.mOptOBV_EMA > 0)
{
g.setColor(C.COLOR_MAGENTA);
g.drawLines(mChartEMA, mChartLineLength, 1.0f);
}
renderCursor(g);
renderDrawer(g);
}
