Here is the strategy, buy when histogram is green, sellshort when histogram is red. Exit on trend change or if green/red disappear. No orders accumulation.

defparam cumulateorders=false

//PRC_smTMMS-Oscillator_v3.0 | strategy
//13.09.2019
//Nicolas @ www.prorealcode.com
//Sharing ProRealTime knowledge

// --- settings
RSIPeriod=14
Stochastic1PeriodK  = 8
Stochastic1PeriodD  = 3
Stochastic2PeriodK  = 14
Stochastic2PeriodD  = 3
// --- end of settings

once threshold=50
once ilimit=0

bufRSI=rsi[RSIPeriod]
bufStoch1=stochastic[Stochastic1PeriodK,Stochastic1PeriodD]
bufStoch2=stochastic[Stochastic2PeriodK,Stochastic2PeriodD]
bufRSI=bufRSI-threshold
bufStoch1=bufStoch1-threshold
bufStoch2=bufStoch2-threshold

bufHistUP=0
bufHistDN=0
//bufHistNO=0
if(bufRSI>ilimit and bufStoch1>ilimit and bufStoch2>ilimit) then
bufHistUP=bufStoch2
else
if(bufRSI<ilimit and bufStoch1<ilimit and bufStoch2<ilimit) then
bufHistDN=bufStoch2
else
//bufHistNO=bufStoch2
endif
endif

//bullish order
if bufhistup>0 and bufhistup[1]=0 and not longonmarket then
buy at market 
endif  
//bearish order 
if bufhistdn<0 and bufhistdn[1]=0 and not shortonmarket then 
sellshort at market 
endif
//orders exit when histogram is gray
if bufhistup=0 and longonmarket then 
sell at market 
endif
if bufhistdn=0 and shortonmarket then 
exitshort at market 
endif