TrailingMA.mqh new_sl confusion?

[Sitalk]

Include\Expert\Trailing\TrailingMA.mqh

bool CTrailingMA::CheckTrailingStopLong(CPositionInfo *position,double &sl,double &tp)
{
...
        double new_sl=NormalizeDouble(m_MA.Main(1),m_symbol.Digits());
...
}

bool CTrailingMA::CheckTrailingStopShort(CPositionInfo *position,double &sl,double &tp)
{
...
        double new_sl=NormalizeDouble(m_MA.Main(1)+m_symbol.Spread()*m_symbol.Point(),m_symbol.Digits());
...
}

[William Roeder]

You buy at the Ask and sell at the Bid. Pending Buy Stop orders become market orders when hit by the Ask.

1. Your buy order's TP/SL (or Sell Stop's/Sell Limit's entry) are triggered when the Bid / OrderClosePrice reaches it. Using Ask±n, makes your SL shorter and your TP longer, by the spread. Don't you want the specified amount used in either direction?

2. Your sell order's TP/SL (or Buy Stop's/Buy Limit's entry) will be triggered when the Ask / OrderClosePrice reaches it. To trigger close to a specific Bid price, add the average spread.
             MODE_SPREAD (Paul) - MQL4 programming forum - Page 3 #25

3. The charts show Bid prices only. Turn on the Ask line to see how big the spread is (Tools → Options (control+O) → charts → Show ask line.)

   Most brokers with variable spreads widen considerably at end of day (5 PM ET) ± 30 minutes.
   My GBPJPY shows average spread = 26 points, average maximum spread = 134.
   My EURCHF shows average spread = 18 points, average maximum spread = 106.
   (your broker will be similar).
             Is it reasonable to have such a huge spreads (20 PIP spreads) in EURCHF? - General - MQL5 programming forum (2022)