我有一个脚本，该脚本在移动平均线交叉时添加了一个箭头，但希望显示标签向上/标签向下。
study(title="MA 5/10 Strategy", shorttitle="MA Strategy 5/10", overlay=true)
exponential = input(true, title="Exponential MA")
src = close
ma5 = exponential ? ema(src, 5) : sma(src, 5)
ma10 = exponential ? ema(src, 10) : sma(src, 10)
buy_cond = cross(ma5, ma10) and ma5 > ma10
sell_cond = cross(ma5, ma10) and ma5 < ma10
plotarrow(buy_cond ? 1 : 0, colordown=lime, maxheight=25, minheight=15)
plotarrow(sell_cond ? -1 : 0, colorup=red, maxheight=25, minheight=15)
plot( ma5, color=green, style=line, title="5", linewidth=1)
plot( ma10, color=red, style=line, title="10", linewidth=1)
alertcondition(buy_cond, title = "Go Long", message = "Go Long")
alertcondition(sell_cond, title = "Go Short", message = "Go Short")