diff --git a/src/indicators/SOBV.jl b/src/indicators/SOBV.jl
index 9ebc861..0a74231 100644
--- a/src/indicators/SOBV.jl
+++ b/src/indicators/SOBV.jl
@@ -15,7 +15,7 @@ mutable struct SOBV{Tohlcv,IN,S} <: TechnicalIndicatorSingleOutput{Tohlcv}
 
     sub_indicators::Series
     obv::OBV
-    obv_ma::SMA
+    obv_ma::MovingAverageIndicator
 
     input_modifier::Function
     input_filter::Function
diff --git a/src/other/iterators.jl b/src/other/iterators.jl
index fce5b95..76b4851 100644
--- a/src/other/iterators.jl
+++ b/src/other/iterators.jl
@@ -89,4 +89,4 @@ function Iterators.reset!(itr::TechnicalIndicatorIterator)
         itr.indicator_type{eltype(itr.iterable_input)}(itr.args...; itr.kwargs...)
 end
 
-Base.length(itr::TechnicalIndicatorIterator) = length(itr.input_iterator)
+Base.length(itr::TechnicalIndicatorIterator{T,I}) where {T, I} = length(itr.iterable_input) 
diff --git a/test/runtests.jl b/test/runtests.jl
index f6791c4..0a33153 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -69,15 +69,15 @@ end
 
 
 @testset "OnlineTechnicalIndicators.jl" begin
-    #include("test_ohlcv.jl")
-
-    #@testset "indicators" begin
-    #    include("test_indicators_interface.jl")
-    #    include("test_ind_single_input_single_output.jl")  # SISO
-    #    include("test_ind_single_input_several_outputs.jl")  # SIMO
-    #    include("test_ind_OHLCV_input_single_output.jl")  # MISO
-    #    include("test_ind_OHLCV_input_several_outputs.jl")  # MIMO
-    #end
+    include("test_ohlcv.jl")
+
+    @testset "indicators" begin
+        include("test_indicators_interface.jl")
+        include("test_ind_single_input_single_output.jl")  # SISO
+        include("test_ind_single_input_several_outputs.jl")  # SIMO
+        include("test_ind_OHLCV_input_single_output.jl")  # MISO
+        include("test_ind_OHLCV_input_several_outputs.jl")  # MIMO
+    end
 
     include("test_resample.jl")