Smoothed Moving Average（SMMA）

Smoothed Moving Average（SMMA）－MetaQuotes
Smoothed Moving Average（SMA）－DanielsTrading

Calculation:

Smoothed Moving Average (SMMA)

The first value of this smoothed moving average is calculated as the
simple moving average (SMA):

SUM1 = SUM(CLOSE, N)
SMMA1 = SUM1/N

The second and succeeding moving averages are calculated according
to this formula:

SMMA(i) = (SUM1-SMMA1+CLOSE(i))/N

Where:
SUM1 — is the total sum of closing prices for N periods;
SMMA1 — is the smoothed moving average of the first bar;
SMMA(i) — is the smoothed moving average of the current bar
(except for the first one);
CLOSE(i) — is the current closing price;
N — is the smoothing period.

這指標在TS內部並無內建指標，但是HTS內建有（SMA），因此在轉
部份HTS程式到TS上的時候會需要自己新增自訂函數，在這裡就直
接把這部份的程式碼直接轉成TS，使用者自己加入就可以了。

• 函數名稱取名自定，或者同HTS內建名稱：SMA
  
• 設定完後要記得按Verify（F3）
  

TS新增自訂函數

TS程式碼（修改HTS源碼）

Inputs: Price(Numeric), Length(Numeric);
Variables: Summation(0), Counter(0);

If CurrentBar = 1 Then begin
   Summation = 0;
   For Counter = 0 To Length - 1 begin
       Summation = Summation + Price[Counter];
   End;
   SMA = Summation / Length;
end
Else begin
   Summation = Summation[1] - SMA[1] + Price;
   SMA = Summation / Length;
End;