CERI

//@version=5

indicator("Cumulative Effort & Result Index (CERI) + Buy/Sell Signals", overlay=false)

// Effort = Volume

effort = volume

// Result = Price Movement (close - open)

result = close - open

// Effort × Result

effort_result = effort * result

// Cumulative Effort-Result Index

ceri = ta.cum(effort_result)

// Smoothing

smoothLength = input.int(14, "Smoothing Length")

ceri_smoothed = ta.ema(ceri, smoothLength)

// Plots

plot(ceri, "CERI (Raw)", color=color.new(color.aqua, 0), linewidth=2)

plot(ceri_smoothed, "CERI (Smoothed)", color=color.new(color.yellow, 0), linewidth=2)

histColor = effort_result >= 0 ? color.new(color.green, 0) : color.new(color.red, 0)

plot(effort_result, "Effort × Result Histogram", style=plot.style_histogram, color=histColor)

// Slope

ceri_up = ceri_smoothed > ceri_smoothed[1]

ceri_down = ceri_smoothed < ceri_smoothed[1]

// Histogram color shift

green_now = effort_result >= 0

green_prev = effort_result[1] >= 0

// Buy = histogram red -> green + ceri slope up

buySignal = (not green_prev and green_now) and ceri_up

// Sell = histogram green -> red + ceri slope down

sellSignal = (green_prev and not green_now) and ceri_down

// Plot Buy/Sell Labels (fixed syntax)

plotshape(buySignal, title="Buy", style=shape.labelup, color=color.green, text="BUY", size=size.small, location=location.bottom)

plotshape(sellSignal, title="Sell", style=shape.labeldown, color=color.red, text="SELL", size=size.small, location=location.top)