simple buy/sell indicator help

[fishmarket]

Please help on how should I write the AFL:

Criteria to buy
First day: Close Cross Moving Average 20days(MA20)
Second day: Open Above MA20
If second day fulfill, buy at OPEN
If second day not fulfill, do nothing

MA20=MA(C,20);
Buy = Cross(C,MA20);
SecondDay = Open > MA20
Sell = Cross(MA20,C);

 

[johnnypareek]

Please help on how should I write the AFL:

Criteria to buy
First day: Close Cross Moving Average 20days(MA20)
Second day: Open Above MA20
If second day fulfill, buy at OPEN
If second day not fulfill, do nothing

MA20=MA(C,20);
Buy = Cross(C,MA20);
SecondDay = Open > MA20
Sell = Cross(MA20,C);

try this

MA20=MA(C,20);
SecondDay = Open > MA20
Buy = ref(Cross(C,MA20),-1) and o>ma20;

Sell = Cross(MA20,C);

 

[mastermind007]

MA20=MA(C,20);
SecondDay = Open > MA20
Buy = ref(Cross(C,MA20),-1) and o>ma20;

Sell = Cross(MA20,C);

Code provided by Johnny is correct except one problem, so I am fixing it. I hope Johnny does not mind this.
fishmarket, Remove the highlighted line. (a) Its not used and (b) it will cause compile error !!!