請問交易腳本，KD低檔金叉+固定停損停利，想改成移動停利，要怎麼改 ?謝謝

// 宣告參數

input: Length(9, "計算期數"), RSVt(3, "RSVt權數"), Kt(3, "Kt權數"), LowBound(40, "低檔區"),

       profit_percent(10, "停利(%)"), loss_percent(7, "停損(%)");

variable: _rsv(0), _k(0), _d(0);

// 資料讀取筆數設定

SetTotalBar(maxlist(Length,6) * 3 + 8);

Stochastic(Length, RSVt, Kt, _rsv, _k, _d);

// 多方進場策略：K在低檔區由下往上突破D值。

if _k < LowBound and _k crosses over _d 

and filled = 0 and position = 0 then setposition(1, market);

{多單停損停利(%)}

if filled = 1 and position = 1 and (high >= (filledAvgPrice * (1+(profit_percent / 100))){停利}  

or low <= (filledAvgPrice * (1-(loss_percent/100))){停損}) 

then setposition(0, market);