Buy Tuesday Strategy (by ChartArt)

//@version=2
strategy("Buy Every Tuesday Strategy (by ChartArt)", shorttitle="CA_-_Buy_Tuesday_Strat", overlay=true)

// ChartArt's Buy Every Tuesday Strategy
//
// Version 1.0
// Idea by ChartArt on June 15, 2016.
//
// This strategy is as simple as possible:
// Every Tuesday a new long trade is opened,
// when Monday closed lower than it opened the week.
//
// The strategy stays long while the close is higher
// than the open. All orders are closed when the open is
// lower than the close.
//
// This simple strategy does not have any other
// stop loss or take profit money management logic.
//
// P.S. The strategy code doesn't work on digital assets
// which are traded every day including Saturday and Sunday.
//
// List of my work: 
// https://www.tradingview.com/u/ChartArt/
// 
//  __             __  ___       __  ___ 
// /  ` |__|  /\  |__)  |   /\  |__)  |  
// \__, |  | /~~\ |  \  |  /~~\ |  \  |  
// 
// 


//// Day of the week code (via Chris Moody: https://www.tradingview.com/v/yeeWYrLJ/)

isMon() => dayofweek(time('D')) == monday and close ? 1 : 0
isTue() => dayofweek(time('D')) == tuesday and close ? 1 : 0
isWed() => dayofweek(time('D')) == wednesday and close ? 1 : 0
isThu() => dayofweek(time('D')) == thursday and close ? 1 : 0
isFri() => dayofweek(time('D')) == friday and close ? 1 : 0

//// Strategy

// Strategy entry condition: Yesterday was Monday (again) and Monday closed lower (compared to the Monday open)
longCondition = isMon()[20] and isTue()[19] and isWed()[18] and isThu()[17] and isFri()[16] and isMon()[15] and isTue()[14] and isWed()[13] and isThu()[12] and  isFri()[11] and   isMon()[10] and isTue()[9] and isWed()[8] and isThu()[7] and isFri()[6] and isMon()[5] and isTue()[4] and isWed()[3] and isThu()[2] and  isFri()[1] and isMon()  and  open < close
if (longCondition)
    strategy.entry("long", strategy.long, comment="Tuesday")

// Strategy close condition: The current bar open is lower than the close
strategy.close_all(when = open < close )

//// Alert
alertcondition(longCondition == true , title='Buy Tuesday', message='Buy this Tuesday')
alertcondition(open < close , title='open < close', message='open < close')