Else condition error with previous candle as output

Below is the code:

 bearishDynamicRSISumCarry = if bearishDynamicRSISum == 1 
        1
    else if bullishDynamicRSIsum == 1
        0
    else
        bearishDynamicRSISumCarry[1]

getting an error "undeclare identifier bearishDynamicRSISumCarry