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Domenico D'Errico's article, “Detecting Swings”, presented a four trading strategies for swing trading. Below are the MetaStock formulas for these strategies: Strategy 1 (Pivot High-Low): Buy Long formula: Code:el:= Ref(H, -1) > Max( H, Ref(H, -2));
es:= Ref(L, -1) < Min( L, Ref(L, -2));
ltrade:= If(PREV<=0, If(el, 1, 0),If(es OR (BarsSince(PREV<=0)>=4), -1, PREV));
ltrade = 1 and Ref( ltrade <= 0, -1)
Sell formula: Code:el:= Ref(H, -1) > Max( H, Ref(H, -2));
es:= Ref(L, -1) < Min( L, Ref(L, -2));
ltrade:= If(PREV<=0, If(el, 1, 0),If(es OR (BarsSince(PREV<=0)>=4), -1, PREV));
ltrade = -1
Sell Short formula: Code:el:= Ref(H, -1) > Max( H, Ref(H, -2));
es:= Ref(L, -1) < Min( L, Ref(L, -2));
strade:= If(PREV<=0, If(es, 1, 0),If(el OR (BarsSince(PREV<=0)>=4), -1, PREV));
strade = 1 and Ref( strade <= 0, -1)
Buy to Cover formula: Code:el:= Ref(H, -1) > Max( H, Ref(H, -2));
es:= Ref(L, -1) < Min( L, Ref(L, -2));
strade:= If(PREV<=0, If(es, 1, 0),If(el OR (BarsSince(PREV<=0)>=4), -1, PREV));
strade = -1
Strategy 2 (Bollinger Bands): Buy Long formula: Code:el:= Cross( C, BBandBot(C, 20, S, 2));
es:= Cross( BBandTop(C, 20, S, 2), C);
ltrade:= If(PREV<=0, If(el, 1, 0),If(es OR (BarsSince(PREV<=0)>=4), -1, PREV));
ltrade = 1 and Ref( ltrade <= 0, -1)
Sell formula: Code:el:= Cross( C, BBandBot(C, 20, S, 2));
es:= Cross( BBandTop(C, 20, S, 2), C);
ltrade:= If(PREV<=0, If(el, 1, 0),If(es OR (BarsSince(PREV<=0)>=4), -1, PREV));
ltrade = -1
Sell Short formula: Code:el:= Cross( C, BBandBot(C, 20, S, 2));
es:= Cross( BBandTop(C, 20, S, 2), C);
strade:= If(PREV<=0, If(es, 1, 0),If(el OR (BarsSince(PREV<=0)>=4), -1, PREV));
strade = 1 and Ref( strade <= 0, -1)
Buy to Cover formula: Code:el:= Cross( C, BBandBot(C, 20, S, 2));
es:= Cross( BBandTop(C, 20, S, 2), C);
strade:= If(PREV<=0, If(es, 1, 0),If(el OR (BarsSince(PREV<=0)>=4), -1, PREV));
strade = -1
Strategy 3 (RSI Cross): Buy Long formula: Code:el:= Cross( RSI(5), 40);
es:= Cross( 60, RSI(5));
ltrade:= If(PREV<=0, If(el, 1, 0),If(es OR (BarsSince(PREV<=0)>=4), -1, PREV));
ltrade = 1 and Ref( ltrade <= 0, -1)
Sell formula: Code:el:= Cross( RSI(5), 40);
es:= Cross( 60, RSI(5));
ltrade:= If(PREV<=0, If(el, 1, 0),If(es OR (BarsSince(PREV<=0)>=4), -1, PREV));
ltrade = -1
Sell Short formula: Code:el:= Cross( RSI(5), 40);
es:= Cross( 60, RSI(5));
strade:= If(PREV<=0, If(es, 1, 0),If(el OR (BarsSince(PREV<=0)>=4), -1, PREV));
strade = 1 and Ref( strade <= 0, -1)
Buy to Cover formula: Code:el:= Cross( RSI(5), 40);
es:= Cross( 60, RSI(5));
strade:= If(PREV<=0, If(es, 1, 0),If(el OR (BarsSince(PREV<=0)>=4), -1, PREV));
strade = -1
Strategy 4 (RSI & higher Low / lower High): Buy Long formula: Code:el:= RSI(5) < 40 AND L > Ref(L, -1);
es:= RSI(5) > 60 AND H < Ref(H, -1);
ltrade:= If(PREV<=0, If(el, 1, 0),If(es OR (BarsSince(PREV<=0)>=4), -1, PREV));
ltrade = 1 and Ref( ltrade <= 0, -1)
Sell formula: Code:el:= RSI(5) < 40 AND L > Ref(L, -1);
es:= RSI(5) > 60 AND H < Ref(H, -1);
ltrade:= If(PREV<=0, If(el, 1, 0),If(es OR (BarsSince(PREV<=0)>=4), -1, PREV));
ltrade = -1
Sell Short formula: Code:el:= RSI(5) < 40 AND L > Ref(L, -1);
es:= RSI(5) > 60 AND H < Ref(H, -1);
strade:= If(PREV<=0, If(es, 1, 0),If(el OR (BarsSince(PREV<=0)>=4), -1, PREV));
strade = 1 and Ref( strade <= 0, -1)
Buy to Cover formula: Code:el:= RSI(5) < 40 AND L > Ref(L, -1);
es:= RSI(5) > 60 AND H < Ref(H, -1);
strade:= If(PREV<=0, If(es, 1, 0),If(el OR (BarsSince(PREV<=0)>=4), -1, PREV));
strade = -1
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