// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © unnoticed_owl

//@version=5
indicator("~Vol. Price", explicit_plot_zorder = true)


//---- Inputs

vol_fast_length = input( 7, "Fast Length")
vol_slow_length = input( 14, "Slow Length")

col_vpfast = color.rgb(71, 99, 224)
col_vpslow = color.rgb(233, 78, 125)
col_price_rising = color.rgb(177, 177, 177)
col_price_falling = color.rgb(44, 44, 44)

//---- Functions

vol_price(v, p) => v * p


//---- Calculations

vol_fast = ta.ema(volume, vol_fast_length)
price_fast = ta.ema(close, vol_fast_length)
vp_fast = vol_price( vol_fast, price_fast )
ma_vp_fast = ta.sma( vp_fast, 3)

vol_slow = ta.ema( volume, vol_slow_length )
price_slow = ta.ema( close, vol_slow_length)
vp_slow = vol_price( vol_slow, price_slow )
ma_vp_slow = ta.sma(vp_slow, 3)

vp_difference = vp_fast - vp_slow

price_difference = price_fast - price_slow
price_difference_max = ta.highest( price_difference, vol_slow_length)
price_difference_min = ta.lowest( price_difference, vol_slow_length)
price_difference_normalized = ( price_difference - price_difference_min ) / ( price_difference_max - price_difference_min )
col_price_difference = color.from_gradient( price_difference_normalized, 0, 1, col_price_falling, col_price_rising)
//transparency_price_change = ()

//---- Plots
plot(ma_vp_fast, color=col_vpfast, style = plot.style_line)
plot(ma_vp_slow, color=col_vpslow, linewidth = 2)
//plot( vp_difference, color=color.rgb(0, 102, 255))

bgcolor( col_price_difference )