def percenttChange = 0.10;
def lastPrice = close;
def tradePrice = if !IsNan(EntryPrice()) then EntryPrice() else lastPrice;
def diff = lastPrice - tradePrice;
def pct = if tradePrice != 0 then diff / tradePrice else 0;
plot data = pct * 100;
AssignBackgroundColor(if diff / tradePrice >= percenttChange then Color.DARK_GREEN else Color.BLACK);