convert a small TradingView Incicator(Volume Flow Indicator) into Thinkorswim Script

study(title = "Volume Flow Indicator [LazyBear]", shorttitle="VFI_LB") length = input(130, title="VFI length") coef = input(0.2) vcoef = input(2.5, title="Max. vol. cutoff") signalLength=input(5) smoothVFI=input(false, type=bool) ma(x,y) => smoothVFI ? sma(x,y) : x typical=hlc3 inter = log( typical ) - log( typical[1] ) vinter = stdev(inter, 30 ) cutoff = coef * vinter * close vave = sma( volume, length )[1] vmax = vave * vcoef vc = iff(volume < vmax, volume, vmax) //min( volume, vmax ) mf = typical - typical[1] vcp = iff( mf > cutoff, vc, iff ( mf < -cutoff, -vc, 0 ) ) vfi = ma(sum( vcp , length )/vave, 3) vfima=ema( vfi, signalLength ) d=vfi-vfima plot(0, color=gray, style=3) showHisto=input(false, type=bool) plot(showHisto ? d : na, style=histogram, color=gray, linewidth=3, transp=50) plot( vfima , title="EMA of vfi", color=orange) plot( vfi, title="vfi", color=green,linewidth=2)