SET13_INDEX

//@version=5
indicator(title = "SET13_INDEX", shorttitle="SET13_INDEX")

rsi_period = input.int(title="RSI Period", defval=14, minval=2, maxval = 500)

getRSI(t1) =>
    c = request.security(t1, timeframe.period, close)
    tso = request.financial("SET:PTT", "TOTAL_SHARES_OUTSTANDING", "FQ", ignore_invalid_symbol = true)
    rsi = ta.rsi(c,rsi_period)

ptt_rsi = getRSI("SET:PTT")
aot_rsi = getRSI("SET:AOT")
advanc_rsi = getRSI("SET:ADVANC")
cpall_rsi = getRSI("SET:CPALL")
gulf_rsi = getRSI("SET:GULF")
pttep_rsi = getRSI("SET:PTTEP")
scc_rsi = getRSI("SET:SCC")
scb_rsi = getRSI("SET:SCB")
kbank_rsi = getRSI("SET:KBANK")
bdms_rsi = getRSI("SET:BDMS")
ea_rsi = getRSI("SET:EA")
or_rsi = getRSI("SET:OR")
scgp_rsi = getRSI("SET:SCGP")


plot((ptt_rsi + aot_rsi + advanc_rsi + cpall_rsi+ gulf_rsi + pttep_rsi + scc_rsi + scb_rsi + kbank_rsi + bdms_rsi+ ea_rsi + or_rsi + scgp_rsi)/13,
      color = color.black      )
plot(70, color=color.gray,style = plot.style_stepline)
plot(50, color=color.gray,style = plot.style_stepline)
plot(30, color=color.gray,style = plot.style_stepline)