Binary Option EMA/Stoch Strat (timeframe not working)

//@version=2
strategy("Binary Option EMA/Stoch Strat - Drew", overlay=true)

//stoch

length1 = input(14, minval=1), smoothK = input(1, minval=1), smoothD = input(3, minval=1)
k = sma(stoch(close, high, low, length1), smoothK)
d = sma(k, smoothD)


len = input(4, minval=1, title="Length")
src = input(high, title="Source")
out = ema(src, len)
HIGH = out

len1 = input(4, minval=1, title="Length")
src1 = input(low, title="Source")
out1 = ema(src1, len1)
LOW = out1


HL2 = (HIGH+LOW)/2

len2 = input(21, minval=1, title="Length")
src2 = input(close, title="Source")
out2 = ema(src2, len2)
EMA = out2

timeframe = input(title="Timeframe", type=integer, minval=1, defval=3)


x = close < LOW and open < HL2 and close < EMA  and d < 50 and k < 50

y =   close > HIGH and open > HL2 and close > EMA and d > 50 and k > 50

if (x)
    strategy.entry("UP", strategy.long)

if (y)
    strategy.entry("DOWN", strategy.short)

// original expiry tie code (doesn't work properly)
//bars = barssince(strategy.opentrades == 0)
//strategy.close_all(when=(bars>=timeframe))

// new expiry time code (still not working)
opened_order = strategy.position_size[0] != strategy.position_size[1] and strategy.position_size[0] != 0
bars = barssince(opened_order) + 1
strategy.close_all(when=(bars>=timeframe))