[amibroker] Solid Fill See Through?

[blackcat54]

The following formula plots Trend1Sm with a solid blue fill.

Is there a way to control the translucence or opacity of the fill?

I want to overlay two solid plots and see both. The closest I have come is to 
plot one as a fat histogram, and one as solid.

Plot(Trend1Sm,"Trend 1 Sm",ParamColor( "Color", colorBlue ),1);

PlotOHLC(Trend1Sm,Trend1Sm,0,Trend1Sm,"",ParamColor( "Color", colorBlue 
),styleCloud);

Thanks