[RS]Dollar Composite Index V0

Majors equally weighted Dollar index .
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study(title='[RS]Dollar Composite Index V0', shorttitle='DCI')
INVERT = input(false)
range = cum(close-close[1])
f_composite(_tf, _src)=>
    _eurusd = security('EURUSD', _tf, -_src)
    _gbpusd = security('GBPUSD', _tf, -_src)
    _audusd = security('AUDUSD', _tf, -_src)
    _usdjpy = security('USDJPY', _tf, _src)
    _usdcad = security('USDCAD', _tf, _src)
    _usdchf = security('USDCHF', _tf, _src)
    _return = (_eurusd + _gbpusd + _audusd + _usdjpy + _usdcad + _usdchf)/6

v_close = INVERT ? -f_composite(period, cum(close/close[1])) : f_composite(period, cum((close-close[1])/close))
v_high = INVERT ? -f_composite(period, cum(high/high[1])) : f_composite(period, cum((high-high[1])/high))
v_low = INVERT ? -f_composite(period, cum(low/low[1])) : f_composite(period, cum((low-low[1])/low))

plotcandle(v_close[1], v_high, v_low, v_close, title='DCI', color=change(v_close)>=0?lime:red)


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