Net Liquidity (WALCL - TGA - ON RRP)

//version=5
indicator("Net Liquidity (WALCL - TGA - ON RRP)", overlay=false, timeframe="W")
a = request.security("FRED:WALCL", "W", close) // Fed total assets (millions)
b = request.security("FRED:WTREGEN", "W", close) // TGA (millions)
c = request.security("FRED:RRPONTSYD","W", close) // ON RRP (millions)
netliq = (a - b - c) / 1000.0 // billions
plot(netliq, color=color.new(color.blue, 0), linewidth=2)